WO2012016536A1 - Procédé et système de communication de service d'un appareil de réseau d'accès - Google Patents

Procédé et système de communication de service d'un appareil de réseau d'accès Download PDF

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Publication number
WO2012016536A1
WO2012016536A1 PCT/CN2011/078009 CN2011078009W WO2012016536A1 WO 2012016536 A1 WO2012016536 A1 WO 2012016536A1 CN 2011078009 W CN2011078009 W CN 2011078009W WO 2012016536 A1 WO2012016536 A1 WO 2012016536A1
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WIPO (PCT)
Prior art keywords
address
service
port
access switch
packet
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PCT/CN2011/078009
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English (en)
Chinese (zh)
Inventor
陆宏成
杨春晖
Original Assignee
北京乾唐视联网络科技有限公司
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Application filed by 北京乾唐视联网络科技有限公司 filed Critical 北京乾唐视联网络科技有限公司
Priority to US13/814,718 priority Critical patent/US9083656B2/en
Publication of WO2012016536A1 publication Critical patent/WO2012016536A1/fr

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Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L45/00—Routing or path finding of packets in data switching networks
    • H04L45/74—Address processing for routing
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L12/00—Data switching networks
    • H04L12/28—Data switching networks characterised by path configuration, e.g. LAN [Local Area Networks] or WAN [Wide Area Networks]
    • H04L12/2854—Wide area networks, e.g. public data networks
    • H04L12/2856—Access arrangements, e.g. Internet access
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L12/00—Data switching networks
    • H04L12/28—Data switching networks characterised by path configuration, e.g. LAN [Local Area Networks] or WAN [Wide Area Networks]
    • H04L12/2854—Wide area networks, e.g. public data networks
    • H04L12/2856—Access arrangements, e.g. Internet access
    • H04L12/2869—Operational details of access network equipments

Definitions

  • the present invention relates to the technical field of a novel network, and in particular to a service communication method for an access network device, a service communication system for an access network device, a node server, and an access switch. Background technique
  • New networks including the Internet, enable different individuals and institutions to exchange information and other information resources.
  • Networks typically include technologies such as path, transport, signaling, and network management. These techniques have been widely found in various literatures. An overview of this is: Steven Shepherd's Telecommunications Convergence (McGraw-Hill, 2000), Annabel Z. Dodd's The Essential Guide, to Telecommimications, Third Edition (Prentice Hall PRT, 2001) ), or Ray Horak's second edition of Communications Systems and Networks (M&T Books, 2000). The advances in these technologies have greatly improved the speed and quality of information transmission and reduced its costs.
  • Path technologies connecting terminals to a wide-area transport network have evolved from 14.4, 28.8 and 56K modems to include ISDN, Tl, cable modem, DSL, Ethernet and wireless Connected technology.
  • Synchronous Optical Network SONET
  • Dense Wavelength Division Multiplexing DWDM
  • Frame Relay FR2
  • ATM Asynchronous Transfer Mode
  • RPR Resilient Packet Ring
  • IP Internet Protocol
  • TCP/IP Transmission Control Protocol/Internet Protocol
  • ARPANET ARPANET
  • Application layer - Application layer is a general term for all applications that users are targeting.
  • the TCP/IP protocol family has many protocols at this level to support different applications, and many of the familiar Internet-based applications are inseparable from these protocols.
  • the HTTP protocol the FTP protocol for file transfer
  • the SMTP for email transmission
  • DNS protocol domain name resolution
  • Telnet protocol Telnet protocol for remote login, etc.
  • the function of the transport layer one layer is mainly to provide communication between applications.
  • the TCP/IP protocol family has TCP and UDP protocols at this layer.
  • Network layer one is a very critical layer in the TCP/IP protocol family, mainly defining IP ground.
  • the address format enables data of different application types to be smoothly transmitted over the Internet.
  • the IP protocol is a network layer protocol.
  • Network Interface Layer This is the lowest layer of TCP/IP software. It is responsible for receiving IP packets and sending them over the network, or receiving physical frames from the network, extracting IP datagrams and handing them over to the IP layer.
  • IP IP-to-Network Interface
  • the main reason for their incompatibility is because of the basic unit of data they transmit (technically called "frames").
  • the format is different.
  • the IP protocol is actually a set of protocol software consisting of software programs that convert all kinds of different "frames" into an "IP packet” format. This conversion is one of the most important features of the Internet, making all kinds of computers Interoperability can be achieved on the Internet, which is characterized by "openness.”
  • a packet is also a form of packet switching, in which the transmitted data is segmented into “packets” and then transmitted. However, it belongs to the "connectionless type", and each "package” (grouping) that is marked is transmitted as an "independent message”, so it is called “data packet”. In this way, it is not necessary to connect a circuit before starting communication, and each data packet does not have to be transmitted through the same path, so it is called “no connection type”. This feature is very important, and it greatly enhances the robustness and security of the network in the case of text messaging.
  • Each packet has two parts: a header and a message.
  • the header has a necessary content such as a destination address, so that each packet can accurately reach the destination without going through the same path. Recombination at the destination to restore the originally transmitted data. This requires the IP to have the function of packet packing and assembly.
  • the data packet can also change the length of the data packet according to the packet size specified by the network.
  • the maximum length of the IP data packet can reach 65535 bytes.
  • QoS Quality of Service
  • the network transmission quality is specifically represented by packet loss and bit error.
  • Computer files are not sensitive to errors in transmission. Even if most of the packets are lost during transmission, the computer will still consider the network available, as long as there is a TCP retransmission mechanism. However, if the packet loss and bit error rate are higher than one thousandth, the video quality will be degraded for synchronous video. Experience data tells us that high-quality video communications even require less than one in 100,000 lost packets and errors. The test data of the current network environment shows that most of the packet loss occurs inside the router, and the error generated in the fiber transmission is almost negligible.
  • “Inte Serv” is built on the basis of independent stream resource reservation, using Resource Reservation Setup Protocol (RSVP).
  • RSVP Resource Reservation Setup Protocol
  • RSVP 2Mbps bandwidth can only be macroscopic. If 1 second of data is sent in the first half of the second, it will cause problems and form periodic burst traffic. Because the core idea of the IP Internet is to do its best, at every network node, the switch always tries to forward data as fast as possible. When a video is circulated through a multi-level switch, the traffic distribution will be uneven. Multiple non-uniform non-synchronous flows will produce greater non-uniformity over a period of time, that is, network traffic must have periodic blocking. As the number of video users increases, there is no upper limit for periodic blocking. When the internal storage capacity of the switch exceeds the number of packets, the result of packet loss is directly caused. * Why is "Diff Serv" unsuccessful?
  • Diff Serv attempts to provide a better than best-effort network service. This method does not require complex network-wide resource reservation, and implementation is simple. As long as each packet is marked with a "priority, tag, the network switch first processes the video data with "priority,”.
  • the basic principle is that banks can issue gold cards to VIP customers, which can effectively reduce the queue time of high-end customers. This method sounds good too, but it doesn't work.
  • the IP Internet attempts to use storage to absorb transient traffic, with the result that transmission delays are increased. Due to limited storage capacity, there is no upper limit for bursty traffic. Therefore, the storage method can only improve the chance of packet loss of this device, and the burst traffic absorbed by this node will exert more pressure on the next node. Video traffic continues to flow, and the storage mode of the switch intensifies the convergence of bursts to weak nodes, and network packet loss is inevitable.
  • the technical problem to be solved by the present invention is to provide a service communication method for an access network device, which is effective for saving bandwidth and routing resources, ensuring stable and smooth transmission path, avoiding delay of multimedia services, and ensuring national information security requirements. And save hardware resources to ensure network transmission quality.
  • the embodiment of the invention further provides a service communication system of an access network device, a node server and an access switch, which are used to ensure the implementation and implementation of the above method in practice. use.
  • the embodiment of the present invention discloses a service communication method for an access network device, where the access network device includes a source terminal and a target terminal that are jointly connected to the same access switch, where The method includes the following steps:
  • the node server notifies the access switch that the source terminal and the target terminal are connected to in the internal packet address table according to the request of the current service, and the downlink port of the access switch that is directed by the secondary service data packet ;
  • the source terminal sends an uplink data packet of the current service
  • the access switch After receiving the data packet, the access switch directs the data packet to a corresponding downlink port according to the setting of its internal data packet address table, and transmits the data packet to the target terminal through the downlink port.
  • the access switch is notified via the node server to set the current time in the internal packet address table.
  • the service port is directed to the downlink port; the service communication between the source terminal and the target terminal does not need to upload the data packet to the node server, and then the node server sends the data packet to the corresponding terminal, and directly passes through the corresponding downlink port of the access switch. Send the data packet.
  • the communication routing manner of the access switch connected to the node server is not limited.
  • the node server master control configuration packet address table may be adopted according to the present invention, and The manner in which the packet address table is used for data packet transmission; the existing IP routing mode may also be adopted, which is not limited by the present invention.
  • the access network device refers to a device in the new network that accesses the network part.
  • the new network is a centralized control network structure, which may be a tree network, a star network, a ring network, etc., but on this basis, a centralized control node is needed in the network to control the entire network.
  • the devices in the access network can be mainly divided into three categories: node servers, access switches, and terminals (including various set-top boxes, code boards, memories, etc.).
  • the node server is a node in the access network that functions as a centralized control, and can control the access switch and the terminal.
  • the node server can be directly connected to the access switch or directly connected to the terminal.
  • the communication between the terminals may be bidirectional, that is, in addition to the application scenario in which the source terminal sends a data packet to the target terminal, the embodiment of the present invention may further include the following steps: the target terminal sends the uplink data packet of the current service;
  • the access switch After receiving the data packet, the access switch directs the data packet to a corresponding downlink port according to the setting of the internal data packet address table, and transmits the data packet to the source terminal through the downlink port.
  • the data packet may be a unicast data packet.
  • the data packet address table is a unicast data packet.
  • the address table when the unicast service communicates, the destination address of the data packet is the receiver address.
  • the request of the current service is a request submitted by the source terminal to establish a unicast service communication with the target terminal, and the node server notifies the connection.
  • the steps for setting up the packet address table into the switch include the following substeps:
  • the node server obtains the communication link information of the current service according to the request of the current service, where the communication link information includes: the downlink port information of the access switch connected to the target terminal; the node server according to the communication link information
  • the access switch sends a port configuration protocol packet;
  • the access switch sets a destination port to be a downlink port directed by a data packet of the target terminal in the internal packet address table according to the port configuration protocol packet.
  • the request for the current service includes a request submitted by the source terminal to establish a unicast service communication with the target terminal, and the node server notifies the connection.
  • the steps for setting up the packet address table into the switch include the following substeps:
  • the node server obtains the communication link information of the current service according to the current service request, where the communication link information includes: the downlink port information of the access switch connected to the source terminal, and the downlink port information of the connection target terminal;
  • the node server sends a port configuration protocol packet to the access switch according to the communication link information;
  • the access switch sets, according to the port configuration protocol packet, a downlink port whose destination address is a data packet directed by the source terminal, and a downlink port whose destination address is a packet of the target terminal.
  • the request for the current service includes service type information, service content information, and an access network address of the source terminal, where the service content information includes a service number;
  • the step of the server obtaining the communication link information of the current service includes the following sub-steps:
  • the communication link information may be a one-way communication link information, for example, the source terminal initiates a unicast service request to the target terminal, or the target terminal initiates a unicast service request to the source terminal; or
  • the communication link information may also be two-way communication link information, for example, the source terminal and the target terminal initiate a unicast service request to the opposite end.
  • the node server In the process of establishing a communication connection, the node server notifies the source terminal and the target terminal, and determines whether the current communication link can be adopted according to the response of the target terminal, that is, in a preferred embodiment of the present invention, the node server acquires
  • the step of communication link information of the secondary service further includes the following sub-steps:
  • the node server sends a menu protocol package to the source terminal and the target terminal;
  • the step of the node server acquiring the communication link information of the current service may further include the following sub-steps:
  • menu protocol packet is directed to the source terminal according to the setting of the downlink protocol packet address table preset in the access switch between the node server and the source terminal;
  • menu protocol packet is directed to the target terminal according to the setting of the downlink protocol packet address table preset in the access switch between the node server and the target terminal;
  • the downlink protocol packet address table is set, and the destination address is the current access exchange.
  • the protocol packet of the access network address of the machine is directed to the CPU module; and the port whose destination address is the protocol packet of the address of the other access network device.
  • the node server can send the menu protocol package to the source terminal and the target terminal based on the setting of the preset protocol packet address table.
  • the node server when notifying the access switch to configure the data packet address table, may further send a service processing command to the source terminal and the target terminal, respectively, to notify the source terminal and the target terminal to perform corresponding according to the service processing command. Operation.
  • the data packet may be a multicast data packet.
  • the data packet address table is multicast data. Packet address table. The destination address of the data packet when the multicast service communicates is the multicast address.
  • the request for the current service includes a request for a multicast service communication initiated by the target terminal
  • the step of the node server notifying the access switch to set the data packet address table may include the following sub-steps:
  • the node server obtains the communication link information of the current service according to the request of the current service, where the communication link information includes: the downlink port information of the access switch connected to the target terminal; the node server according to the communication link information
  • the access switch sends a port configuration protocol packet;
  • the access switch sets a data packet whose destination address is a multicast address to the downlink port in its internal data packet address table.
  • the source terminal further initiates a multicast service for the multicast service, for example, the source terminal initiates a live broadcast, and the request for the current service further includes a request for initiating a multicast service communication submitted by the source terminal, where the node server notifies the access.
  • the steps for the switch to set the packet address table also include the following substeps:
  • the node server obtains the communication link information of the current service according to the current service request, where the communication link information includes: the downlink port information of the access switch connected to the source terminal;
  • the node server sends a port configuration to the access switch according to the communication link information.
  • Agreement package
  • the access switch sets a data packet whose destination address is a multicast address in the internal data packet address table to the downlink port.
  • the request for requesting the multicast service communication initiated by the target terminal includes the service type information, the service content information, and the access network address of the target terminal; wherein the service content information Include the service number;
  • the step of the node server acquiring the communication link information of the current service includes the following sub-steps:
  • This embodiment mainly relates to a communication link establishment process when a target terminal requests a multicast service, and thus its communication link is a downlink for transmitting multicast data to a target terminal.
  • the request for initiating the multicast service communication submitted by the source terminal includes service type information, service content information, and an access network address of the source terminal, where
  • the service content information includes a service number
  • the step of the node server acquiring the communication link information of the current service further includes the following substeps:
  • This embodiment mainly relates to a communication link establishment process when a source terminal initiates multicast, and thus the communication link is a downlink for transmitting multicast data to the source terminal.
  • the service processing command may be sent to the target terminal, and the target terminal performs a corresponding operation according to the service processing command; or, to the source terminal Send service processing command, by source The terminal performs a corresponding operation according to the service processing command.
  • the node server may select one of the communication link information as the communication link information of the current service according to a preset rule.
  • the preset rule may be that the node server obtains the traffic information of each communication link, and the traffic information of the secondary service, and determines that the communication link with the smallest used traffic is the current service.
  • the communication link information; or the preset rule may also obtain the bandwidth information of each communication link for the node server, and the bandwidth information of the current service, and determine the communication link with the largest bandwidth as the communication link of the current service. Road information.
  • the request for the secondary service is recorded in the service request protocol packet, and the setting of the uplink protocol packet address table is preset according to the access switch connected between the source terminal and the node server. Transmitting, by the uplink port of the access switch, the service request protocol packet to a node server;
  • the uplink protocol packet address table is configured with an uplink port that is forwarded by the protocol packet of the node server.
  • the node server may, according to the setting of the internal protocol packet address table preset therein, connect the port configuration protocol packet to the corresponding by connecting the downlink port of the corresponding access switch.
  • Access switch
  • the downlink protocol packet address table is provided with a downlink port that is forwarded by a protocol packet whose destination address is a lower-level access network device address.
  • the embodiment of the present invention may further include the following steps after the service is completed:
  • the node server After completing the current service, the node server sends a port release command to the access switch that the source terminal and the target terminal are commonly connected to;
  • the access switch releases the port that the set current service data packet is directed to in the internal packet address table according to the port release command.
  • the node server also issues a service processing end command to the source terminal and/or the target terminal, and the source terminal and/or the target terminal terminates the service according to the service processing end command. Processing.
  • the node server is further provided with an address information table in which the address occupation information, the device identification information, and the device resource information are recorded.
  • the node server modifies the content in the preset address information table, and the modification includes updating the address occupation information of the port released by the access switch to be unused.
  • the access network device further includes an Ethernet protocol conversion gateway and a local area network connected between the access switch and the source terminal and the target terminal. The embodiment of the present invention may further include the following steps:
  • the Ethernet co-transfer gateway enters the new network, and the Ethernet co-transfer gateway is obtained from the node server.
  • the Ethernet protocol conversion gateway receives a data packet or a protocol packet sent by the new network, adds a MAC address of the Ethernet protocol conversion gateway and a MAC address of the target terminal in the data packet or the protocol packet, and then sends the data address to the local area Ethernet network;
  • the target terminal and the source terminal follow a novel network protocol.
  • the present invention transforms the standard Ethernet gateway, making it a special A type of access switch that acts as a connection between the new network and Ethernet.
  • the modified Ethernet gateway is called an Ethernet protocol transfer gateway.
  • the Ethernet Co-Transfer Gateway is located in the access network and can be connected to the access switch or directly to the node server.
  • the Ethernet protocol conversion gateway is connected to a standard Ethernet switch, and the Ethernet switch is connected to the terminal.
  • the data transmission between the novel network and the Ethernet mainly involves the following four types of data.
  • Query packet A protocol packet sent by the node server to the access switch, Ethernet protocol conversion gateway or terminal;
  • Response packet A protocol packet that is responded to the node server by the access switch, Ethernet protocol translation gateway, or terminal;
  • the Ethernet Co-Transfer Gateway mainly performs the forwarding of the above four types of data between the new network and the Ethernet.
  • the core implementation ideas are:
  • the Ethernet protocol conversion gateway accesses the new network, and obtains the MAC address of the Ethernet protocol conversion gateway and the terminal MAC address registered under the Ethernet protocol conversion gateway from the node server with centralized control function.
  • the Ethernet protocol conversion gateway receives the data packet or the protocol packet sent by the new network, the MAC address of the Ethernet protocol conversion gateway and the MAC address of the target terminal are added to the data packet or the protocol packet, and then sent to the Ethernet.
  • the Ethernet protocol is used for transmission in the Ethernet; when the Ethernet protocol conversion gateway receives the data packet or protocol packet sent by the Ethernet, the MAC address and the source terminal of the Ethernet protocol conversion gateway in the data packet or the protocol packet are removed.
  • the MAC address is then sent to the new network, which uses the new network protocol for transmission in the new network.
  • the target terminal and the source terminal follow a novel network protocol, so that the target terminal and the source terminal can enter the Ethernet through the MAC address, and enter the new network by following the new network protocol, thereby implementing two different types of networks. Compatible transmission.
  • the data packet sent by the novel network and the data packet sent by the Ethernet include the address of the novel network at both ends of the transmission, and the address is the source address and the destination address of the data packet.
  • the embodiment may further include the following steps:
  • the Ethernet Co-Transfer Gateway receives the data packet sent by the new network, according to the purpose of the data packet.
  • the binding relationship between the terminal MAC address and the Ethernet protocol conversion gateway is preset in the node server when the terminal and the Ethernet protocol conversion gateway are sold.
  • the embodiment of the present invention further discloses a service communication method for an access network device, where the access network device includes a source terminal and a target terminal that are connected to each other under the access switch of the current level, and the primary access switch A subordinate access switch is connected to the source terminal and/or the target terminal, and the method includes the following steps:
  • the node server notifies the local access switch to set the downlink address port of the access switch that is directed by the secondary service data packet according to the request of the current service, and notifies the lower level
  • the access switch is set in its internal packet address table, and the port of the access switch that is directed by the secondary service packet;
  • the access switch and the lower-level switch of the current level respectively direct the data packet to the corresponding port for transmission according to the setting of the data packet address table.
  • This embodiment mainly provides a method for directly communicating between terminals connected to a local access switch.
  • the service communication between the source terminal and the target terminal does not need to upload the data packet to the node server, and then the node server sends the data packet to the corresponding terminal, and directly passes through the access switch of the current level and the access switch of the lower level.
  • the corresponding port can transmit data packets.
  • the communication routing mode of the access switch connected to the node server is preferably the method for configuring the data packet address based on the node server master control according to the present invention, and the method for transmitting the data packet according to the data packet address table. .
  • the communication between the terminals may be bidirectional, that is, the embodiment of the present invention may include the following steps:
  • the access switch of the current level receives the uplink data packet sent by the target terminal/source terminal to the source terminal/target terminal, and according to the setting of the data packet address table in the access switch of the current level, The data packets are respectively directed to the corresponding ports and transmitted to the lower-level access switches.
  • the lower-level switches respectively direct the data packets to the corresponding ports according to the setting of the data packet address table, and transmit the data packets to the source terminal/target terminal through the ports. .
  • the embodiment of the present invention is applicable to any unicast service, that is, as an example of a specific application, the data packet may be a unicast data packet.
  • the data packet address table is a unicast data packet. Address table.
  • Case 1 The source terminal is directly connected to the access switch of the current level, and the target terminal is connected to the access switch of the current level through the lower-level access switch;
  • the node server notifies the access switch to set the data packet address table, the following sub-steps are included:
  • the node server receives the request of the source terminal to establish a service communication with the target terminal, and obtains the communication link information of the current service according to the request, where the communication link information includes: the local access switch is connected to the lower level access The downlink port information of the switch, and the downlink port information of the lower-level access switch connected to the target terminal;
  • the node server sends a port configuration protocol packet to the local access switch and the lower access switch according to the communication link information;
  • the primary access switch sets a destination port whose destination address is a packet-oriented downlink port in the internal packet address table according to the port configuration protocol packet;
  • the lower-level access switch sets a destination port whose destination address is a packet-oriented downlink port of the target terminal according to the port configuration protocol packet in the internal packet configuration table.
  • Scenario 2 The source terminal is directly connected to the access switch of the current level, and the target terminal is connected to the access switch of the current level through the lower-level access switch.
  • the node server notifies the access.
  • the steps for the switch to set the packet address table include the following substeps:
  • the node server receives a request submitted by the source terminal to establish a service communication with the target terminal, and Obtaining the communication link information of the current service according to the request, the communication link information includes: downlink port information of the lower-level access switch connected to the lower-level access switch, and downlink of the lower-level access switch connected to the target terminal And the downlink port information of the source access switch connected to the source access switch, and the downlink access port information of the source access switch connected to the source terminal;
  • the node server sends a port configuration protocol packet to the local access switch and the lower access switch according to the communication link information;
  • the primary access switch sets a destination port whose destination address is a packet-oriented downlink port of the target terminal according to the port configuration protocol packet in the internal packet configuration table, and the destination address is a packet-oriented downlink of the source terminal.
  • the lower-level access switch sets a destination port whose destination address is a downlink port directed by the data packet of the target terminal according to the port configuration protocol packet in the internal packet configuration table, and the destination address is a packet-oriented uplink of the source terminal. port.
  • Scenario 3 The source terminal is connected to the access switch of the current level through the lower-level access switch, and the target terminal is directly connected to the access switch of the current level.
  • the node server In the case of one-way unicast communication, the node server notifies the access switch.
  • the steps to set up the packet address table include the following substeps:
  • the node server receives the request that the source terminal establishes a service communication with the target terminal, and obtains the communication link information of the current service according to the request, where the communication link information includes: the lower-level access switch is connected to the access level The uplink port information of the switch, and the downlink port information of the target access switch connected to the target terminal;
  • the node server sends a port configuration protocol packet to the local access switch and the lower access switch according to the communication link information;
  • the primary access switch sets a destination port whose destination address is a packet-oriented downlink port in the internal packet address table according to the port configuration protocol packet;
  • the lower-level access switch sets an uplink port to which the destination address is a packet directed by the target terminal according to the port configuration protocol packet in the internal packet address table.
  • Case 4 The source terminal is connected to the access switch of the current level through the lower-level access switch.
  • the target terminal is directly connected to the access switch of the current level; in the case of bidirectional unicast communication, the step of the node server notifying the access switch to set the data packet address table includes the following sub-steps:
  • the node server receives the request that the source terminal establishes a service communication with the target terminal, and obtains the communication link information of the current service according to the request, where the communication link information includes: the lower-level access switch is connected to the access level The uplink port information of the switch, the downlink access port information of the target access switch is connected to the target terminal; and the downlink access port information of the lower-level access switch is connected to the lower-level access switch, and the lower-level access switch is connected to the source terminal Downstream port information;
  • the node server sends a port configuration protocol packet to the local access switch and the lower access switch according to the communication link information;
  • the primary access switch sets a destination port whose destination address is a packet-oriented downlink port of the target terminal according to the port configuration protocol packet in the internal packet configuration table, and the destination address is a packet-oriented downlink of the source terminal.
  • the lower-level access switch sets, according to the port configuration protocol packet, an uplink port whose destination address is a data packet directed by the target terminal, and a destination address that is a packet-oriented downlink of the source terminal. port.
  • Scenario 5 The source terminal is connected to the access switch of the current level through the first lower-level access switch, and the target terminal is connected to the access switch of the current level through the second lower-level access switch;
  • the step of the node server notifying the access switch to set the data packet address table includes the following sub-steps:
  • the node server receives the request that the source terminal establishes a service communication with the target terminal, and obtains the communication link information of the current service according to the request, where the communication link information includes: the first lower-level access switch connection book The uplink port information of the level accessing switch, the downlink access port information of the second-level access switch, and the downlink port information of the second lower-level access switch connected to the target terminal;
  • the node server sends a port configuration protocol packet to the local access switch, the first lower access switch, and the second lower access switch according to the communication link information;
  • the primary access switch sets a destination port whose destination address is a packet-oriented downlink port of the target terminal according to the port configuration protocol packet in the internal packet configuration table, and the destination address is a packet-oriented downlink of the source terminal. port;
  • the first lower-level access switch sets, according to the port configuration protocol packet, an uplink port whose destination address is a packet directed by the target terminal, and a destination packet whose source address is a source terminal.
  • the second lower-level access switch sets a destination port whose destination address is a packet-oriented downlink port of the target terminal according to the port configuration protocol packet in the internal packet configuration table, and the destination address is a packet directed by the source terminal. Upstream port.
  • the source terminal is connected to the access switch of the current level through the first lower-level access switch, and the target terminal is connected to the access switch of the current level through the second lower-level access switch; in the case of bidirectional unicast communication
  • the step of the node server notifying the access switch to set the data packet address table includes:
  • the node server receives the request that the source terminal establishes a service communication with the target terminal, and obtains the communication link information of the current service according to the request, where the communication link information includes: the first lower-level access switch connection book The uplink port information of the level access switch, the downlink access port information of the second access switch connected to the second access switch, and the downlink port information of the target terminal connected to the second lower access switch; and the second The lower access switch is connected to the uplink port information of the access switch of the local level, the access switch of the local level is connected to the downlink port information of the first access switch, and the first access switch is connected to the downlink port information of the source terminal.
  • the node server sends a port configuration protocol packet to the local access switch, the lower-level access switch, and the second lower-level access switch according to the communication link information;
  • the primary access switch sets a destination port whose destination address is a packet-oriented downlink port in the internal packet address table according to the port configuration protocol packet;
  • the first lower-level access switch sets an uplink port that is forwarded by the data packet of the target terminal in the internal packet address table according to the port configuration protocol packet;
  • the second subordinate access switch configures the number of protocol packets in the internal port according to the port According to the packet address table, the destination address is set as the downlink port of the target terminal.
  • the request submitted by the source terminal to establish a unicast service communication with the target terminal includes service type information, service content information, and an access network address of the source terminal, where the service Content information includes a service number;
  • the step of the node server acquiring the communication link information of the current service includes the following sub-steps:
  • the communication link information may be a one-way communication link information, for example, the source terminal initiates a unicast service request to the target terminal, or the target terminal initiates a unicast service request to the source terminal; or
  • the communication link information may also be two-way communication link information, for example, the source terminal and the target terminal initiate a unicast service request to the opposite end.
  • the node server In the process of establishing a communication connection, the node server notifies the source terminal and the target terminal, and determines whether the current communication link can be adopted according to the response of the target terminal, that is, in a preferred embodiment of the present invention, the node server acquires
  • the step of communication link information of the secondary service further includes the following sub-steps:
  • the node server sends a menu protocol package to the source terminal and the target terminal;
  • the step of the node server acquiring the communication link information of the current service further includes the following sub-steps:
  • menu protocol packet is directed to the source terminal according to the setting of the downlink protocol packet address table preset in the access switch between the node server and the source terminal;
  • menu protocol packet is directed to the target terminal according to the setting of the downlink protocol packet address table preset in the access switch between the node server and the target terminal;
  • the downlink protocol packet address table is configured with a protocol packet whose destination address is an access network address of the current access switch, and is directed to the CPU module; and the destination address is another access network.
  • the node server can send the menu protocol package to the source terminal and the target terminal based on the setting of the preset protocol packet address table.
  • the node server when notifying the access switch to configure the data packet address table, may further send a service processing command to the source terminal and the target terminal, respectively, to notify the source terminal and the target terminal to perform corresponding according to the service processing command. Operation.
  • the data packet may be a multicast data packet.
  • the data packet address table is multicast data. Packet address table. The destination address of the data packet when the multicast service communicates is the multicast address.
  • the node server notifies the connection according to different situations in which the target terminal is connected to the access switch of the current level.
  • There are different ways to set the packet address table into the switch including the following two situations:
  • Scenario 1 The target terminal is directly connected to the access switch of the current level.
  • the request for the current service includes a request for requesting multicast service communication initiated by the target terminal, and the node server notifies the access switch.
  • the steps to set up the packet address table include the following substeps:
  • the node server obtains the communication link information of the current service according to the request of the current service, and the communication link information includes: the downlink port information of the target access switch connected to the target terminal;
  • the node server sends a port configuration protocol packet to the access switch of the current level according to the communication link information
  • the primary access switch according to the port configuration protocol packet, in the internal data packet address table, sets a data packet whose destination address is a multicast address to the downlink port.
  • Scenario 2 The target terminal is connected to the access switch of the current level through the subordinate access switch.
  • the request for the current service includes a request for requesting multicast service communication initiated by the target terminal, where the node server Notifying the access switch to set the packet address table
  • the steps include the following substeps:
  • the node server obtains the communication link information of the current service according to the request of the current service, where the communication link information includes the downlink port information of the access switch connected to the lower-level access switch, and the lower-level access
  • the switch connects the downlink port information of the target terminal; the node server sends a port configuration protocol packet to the local access switch and the lower access switch according to the communication link information;
  • the primary access switch according to the port configuration protocol packet, in the internal data packet address table, set a downlink port that is forwarded by the data packet whose destination address is a multicast address;
  • the lower-level access switch sets a downlink port that is forwarded by a data packet whose destination address is a multicast address in the internal packet address table according to the port configuration protocol packet.
  • the multicast service for the source terminal further initiates the multicast service, for example, the source terminal initiates the live broadcast, and the node server notifies the access switch to set the data packet address table according to different situations in which the source terminal and the access switch of the current level are connected.
  • the method is different, mainly including the following two situations:
  • the request for the current service further includes a request for initiating a multicast service communication submitted by the source terminal, where the source terminal is directly connected to the access switch of the current level, and the communication link information further includes: the current level The downlink port information of the access switch connected to the source terminal;
  • the step of the node server notifying the access switch to set the data packet address table further includes: the node server sending the port configuration protocol packet to the access switch of the current level according to the communication link information;
  • the primary access switch according to the port configuration protocol packet, in the internal data packet address table, sets a data packet whose destination address is a multicast address to the downlink port.
  • the request for the current service further includes a request for initiating a multicast service communication submitted by the source terminal, where the source terminal is connected to the access switch of the current level by using a lower-level access switch, where the communication link information further includes The downlink access port information of the access switch connected to the lower-level access switch, and the downlink port information of the lower-level access switch connected to the source terminal; and the step of the node server notifying the access switch to set the data packet address table further includes : the node server respectively goes to the local access switch according to the communication link information and The lower level access switch sends a port configuration protocol packet;
  • the local access switch sets, in its internal data packet address table, a data packet whose destination address is a multicast address to the downlink port;
  • the lower-level access switch sets a data packet whose destination address is a multicast address to the downlink port in its internal data packet address table.
  • the request for requesting the multicast service communication initiated by the target terminal includes the service type information, the service content information, and the access network address of the target terminal; wherein the service content information Include the service number;
  • the step of the node server acquiring the communication link information of the current service includes: extracting, according to the service number, an access network address of the source terminal in the preset content-address mapping table;
  • This embodiment mainly relates to a communication link establishment process when a target terminal requests a multicast service, and thus its communication link is a downlink for transmitting multicast data to a target terminal.
  • the request for initiating the multicast service communication submitted by the source terminal includes service type information, service content information, and an access network address of the source terminal, where
  • the service content information includes a service number
  • the step of the node server acquiring the communication link information of the current service further includes: allocating a multicast address to the source terminal according to the request;
  • This embodiment mainly relates to a communication link establishment process when a source terminal initiates multicast, and thus the communication link is a downlink for transmitting multicast data to the source terminal.
  • the service processing command may be sent to the target terminal, and the target terminal performs a corresponding operation according to the service processing command; or, to the source terminal Send service processing command, by source The terminal performs a corresponding operation according to the service processing command.
  • the node server selects one of the communication link information as the communication link information of the current service according to a preset rule.
  • the preset rule may be that the node server obtains the traffic information of each communication link, and the traffic information of the secondary service, and determines that the communication link with the smallest used traffic is the current service.
  • the communication link information; or the preset rule may also obtain the bandwidth information of each communication link for the node server, and the bandwidth information of the current service, and determine the communication link with the largest bandwidth as the communication link of the current service. Road information.
  • the request for the secondary service is recorded in the service request protocol packet, and the setting of the uplink protocol packet address table is preset according to the access switch connected between the source terminal and the node server. Transmitting, by the uplink port of the access switch, the service request protocol packet to a node server;
  • the uplink protocol packet address table is configured with an uplink port that is forwarded by the protocol packet of the node server.
  • the node server directs the port configuration protocol packet to the corresponding connection by connecting the downlink port of the corresponding access switch according to the setting of the internal protocol packet address table preset therein.
  • the switch Into the switch;
  • the downlink protocol packet address table is provided with a downlink port that is forwarded by a protocol packet whose destination address is a lower-level access network device address.
  • the embodiment of the present invention may further include the following steps after the service is completed:
  • the node server After completing the current service, the node server sends a port release command to the access switch participating in the current service;
  • the access switch releases the port that the set current service data packet is directed to in the internal packet address table according to the port release command.
  • the node server also issues a service processing end command to the source terminal and/or the target terminal, and the source terminal and/or the target terminal terminates the service according to the service processing end command. Processing.
  • the node server is further provided with an address information table in which the address occupation information, the device identification information, and the device resource information are recorded.
  • the node server modifies the content in the preset address information table, and the modification includes updating the address occupation information of the port released by the access switch to be unused.
  • the access network device further includes an Ethernet protocol conversion gateway and a local area network connected between the access switch and the source terminal and the target terminal. The embodiment of the present invention may further include the following steps:
  • the Ethernet protocol conversion gateway accesses the new network, and obtains the Ethernet protocol conversion gateway from the node server.
  • the Ethernet protocol conversion gateway receives a data packet or a protocol packet sent by the new network, adds a MAC address of the Ethernet protocol conversion gateway and a MAC address of the target terminal in the data packet or the protocol packet, and then sends the data address to the local area Ethernet network;
  • the target terminal and the source terminal follow a novel network protocol.
  • the data packet sent by the novel network and the data packet sent by the Ethernet include the address of the novel network at both ends of the transmission, and the address is the source address and the destination address of the data packet.
  • the method may further include the following steps: obtaining a mapping between a terminal MAC address bound by the Ethernet protocol translation gateway and an address of the terminal in the novel network;
  • the Ethernet Co-Transfer Gateway receives the data packet sent by the new network, and adds the MAC address of the corresponding target terminal to the data packet according to the mapping between the destination address and the MAC address of the data packet. address.
  • the binding relationship between the terminal MAC address and the Ethernet protocol conversion gateway is preset in the node server when the terminal and the Ethernet protocol conversion gateway are sold.
  • the embodiment of the present invention further discloses a service communication system of an access network device, where the access network device includes a node server, and a source terminal and a target terminal that are jointly connected under the same access switch, and the node server Includes:
  • a notification module configured to notify, according to the request of the current service, that the access switch that is connected to the source terminal and the target terminal is set in a data packet address table thereof, and the access switch that is served by the data packet of the secondary service Downstream port;
  • the access switch includes:
  • a port configuration module configured to set, according to a port configuration notification sent by the node server, a downlink port of the access switch that is directed by the data packet of the secondary service in the internal packet address table;
  • the first port guiding module is configured to: after receiving the uplink data packet of the current service sent by the source terminal, according to the setting of the internal data packet address table, direct the data packet to the corresponding downlink port, and transmit the data packet through the downlink port To the target terminal.
  • the communication between the terminals may be bidirectional, that is, in addition to the application scenario in which the source terminal sends a data packet to the target terminal, in the embodiment of the present invention, the access switch further includes:
  • the second port guiding module is configured to: after receiving the uplink data packet of the current service sent by the target terminal, according to the setting of the internal data packet address table, direct the data packet to the corresponding downlink port, and transmit the data packet through the downlink port To the source terminal.
  • the data packet may be a unicast data packet.
  • the data packet address table is a unicast data packet.
  • the address table when the unicast service communicates, the destination address of the data packet is the receiver address.
  • the request for the current service is a request submitted by the source terminal to establish a unicast service communication with the target terminal
  • the notification module of the node server includes:
  • a first communication link acquisition sub-module configured to acquire communication link information of the current service according to the request of the current service, where the communication link information includes: the downlink port information of the access switch connected to the target terminal;
  • a port configuration protocol packet sending submodule configured to send a port configuration protocol packet to the access switch according to the communication link information
  • the port configuration module of the access switch includes:
  • the first port configuration submodule is configured to set, according to the port configuration protocol packet, a destination port whose destination address is a downlink port directed by the target terminal in the internal packet address table.
  • the request for the current service includes a request submitted by the source terminal to establish a unicast service communication with the target terminal
  • the notification of the node server Modules include:
  • a second communication link acquisition sub-module configured to acquire communication link information of the current service according to the current service request, where the communication link information includes: downlink port information of the access switch connected to the source terminal, and, Downstream port information of the target terminal;
  • a port configuration protocol packet sending submodule configured to send a port configuration protocol packet to the access switch according to the communication link information
  • the port configuration module of the access switch includes:
  • a second port configuration submodule configured to set, in the data packet address table of the port configuration protocol packet, a downlink port whose destination address is a source terminal, and a destination address of the target terminal Downstream port.
  • the request for the current service includes service type information, service content information, and an access network address of the source terminal, where the service content information includes a service number;
  • a communication link acquisition submodule or a second communication link acquisition submodule node server further includes:
  • a target terminal address extracting unit configured to preset content-address according to the service number Extracting an access network address of the target terminal in the mapping table
  • a link calculation unit configured to acquire communication link information of the current service according to the service type information, the source terminal, and the access network address of the target terminal.
  • the communication link information may be a one-way communication link information, for example, the source terminal initiates a unicast service request to the target terminal, or the target terminal initiates a unicast service request to the source terminal; or
  • the communication link information may also be two-way communication link information, for example, the source terminal and the target terminal initiate a unicast service request to the opposite end.
  • the node server In the process of establishing a communication connection, the node server notifies the source terminal and the target terminal, and determines whether the current communication link can be adopted according to the response of the target terminal, that is, in a preferred embodiment of the present invention, the node server further Includes:
  • a menu protocol packet sending module configured to send a menu protocol package to the source terminal and the target terminal;
  • the response protocol packet receiving module is configured to receive a response protocol packet sent by the target terminal for the menu protocol packet.
  • the access switch when the access switch is an access switch connected between the node server and the source terminal, the access switch further includes:
  • a first menu package guiding module configured to direct the menu protocol package to a source terminal according to a setting of a downlink protocol packet address table preset therein;
  • the access switch When the access switch is an access switch connected between the node server and the target terminal, the access switch further includes:
  • a second menu package guiding module configured to direct the menu protocol package to the target terminal according to the setting of the internal protocol packet address table preset therein;
  • the downlink protocol packet address table is configured with a protocol packet directed to the CPU module whose destination address is the access network address of the current access switch; and a port directed by the protocol packet whose destination address is the address of the other access network device. .
  • the node server can send the menu protocol package to the source terminal and the target terminal based on the setting of the preset protocol packet address table.
  • the node service when notifying the access switch to configure the data packet address table, the node service The device may also send a service processing command to the source terminal and the target terminal respectively to notify the source terminal and the target terminal to perform corresponding operations according to the service processing command. That is, in a preferred embodiment of the present invention, the node server further includes:
  • a service processing command sending module configured to separately send a service processing command to the source terminal and the target terminal;
  • the source terminal further includes: a first command execution module, configured to perform a corresponding operation according to the service processing command;
  • the target terminal further includes a second command execution module, configured to perform a corresponding operation according to the service processing command.
  • the data packet may be a multicast data packet.
  • the data packet address table is multicast data. Packet address table. The destination address of the data packet when the multicast service communicates is the multicast address.
  • the request for the current service includes a request for a multicast service communication initiated by the target terminal
  • the notification module of the node server includes: a third communication link acquisition sub-module, configured to acquire communication link information of the current service according to the request of the current service, where the communication link information includes: the access switch connection Downstream port information of the target terminal;
  • a port configuration protocol packet sending submodule configured to send a port configuration protocol packet to the access switch according to the communication link information
  • the port configuration module of the access switch includes:
  • the third port configuration sub-module is configured to, according to the port configuration protocol packet, set a data packet whose destination address is a multicast address to the downlink port in the internal packet address table.
  • the source terminal further initiates a multicast service for the multicast service, for example, the source terminal initiates a live broadcast, and the request for the current service further includes a request for initiating a multicast service communication submitted by the source terminal, and the notification module of the node server include: a fourth communication link acquisition sub-module, configured to acquire communication link information of the current service according to the current service request, where the communication link information includes: downlink port information of the access switch connected to the source terminal;
  • a port configuration protocol packet sending submodule configured to send a port configuration protocol packet to the access switch according to the communication link information
  • the port configuration module of the access switch includes:
  • a fourth port configuration submodule configured to, according to the port configuration protocol packet, set a data packet whose destination address is a multicast address in the internal data packet address table to the downlink port.
  • the request for requesting the multicast service communication initiated by the target terminal includes the service type information, the service content information, and the access network address of the target terminal; wherein the service content information Include the service number;
  • the third communication link acquisition submodule of the node server further includes:
  • the source terminal address extracting unit is configured to extract an access network address of the source terminal in the preset content-address mapping table according to the service number;
  • a multicast address first allocation unit configured to acquire a multicast address corresponding to the source terminal, and allocate the multicast address to the target terminal;
  • the first link calculation unit is configured to obtain, according to the service type information, the source terminal, and the access network address of the target terminal, the communication link information of the current multicast service downlink.
  • This embodiment mainly relates to a communication link establishment process when a target terminal requests a multicast service, and thus its communication link is a downlink for transmitting multicast data to a target terminal.
  • the request for initiating the multicast service communication submitted by the source terminal includes service type information, service content information, and an access network address of the source terminal, where
  • the service content information includes a service number
  • the fourth communication link acquisition submodule of the node server further includes:
  • a second allocation unit of the multicast address configured to allocate a multicast address to the source terminal according to the request
  • a second link calculation unit configured to obtain, according to the service type information, the communication link information of the current multicast service downlink, by the node server and the access network address of the source terminal.
  • This embodiment mainly relates to a communication link establishment process when a source terminal initiates multicast, and thus the communication link is a downlink for transmitting multicast data to the source terminal.
  • the request for the secondary service is recorded in a service request protocol packet, and when the access switch is an access switch connected between the source terminal and the node server, The access switch also includes:
  • An uplink guiding module configured to direct, by the uplink port of the access switch, the service request protocol packet to the node server according to the setting of an internal protocol packet address table preset therein;
  • the uplink protocol packet address table is configured with an uplink port that is forwarded by the protocol packet of the node server.
  • the node server further includes:
  • a downlink guiding module configured to, according to a setting of a downlink protocol packet address table preset therein, to connect the port configuration protocol packet to a corresponding access switch by connecting a downlink port of the corresponding access switch;
  • the downlink protocol packet address table is provided with a downlink port that is forwarded by a protocol packet whose destination address is a lower-level access network device address.
  • the node server further includes: a port release notification module, configured to send a port release command to the access switch that the source terminal and the target terminal are commonly connected after completing the current service. ;
  • the access switch further includes:
  • the port release processing module is configured to: in the data packet address table of the internal port release command, translate the port that is set to the current service data packet.
  • the node server further includes:
  • a service processing end command sending module configured to send a service processing end command to the source terminal and/or the target terminal
  • the source terminal includes a first end processing module, configured to end service processing according to the service processing end command;
  • the target terminal includes a second end processing module, configured to end according to the service processing The command ends the service processing.
  • the node server is further provided with an address information table in which the address occupation information, the device identification information, and the device resource information are recorded.
  • the node server After completing the current service, the node server further includes:
  • the address information table update module is configured to modify the content in the preset address information table, where the modifying includes updating the address occupation information of the port of the access switch to be unused.
  • the access network device further includes an Ethernet protocol conversion gateway and a local area network connected between the access switch and the source terminal and the target terminal.
  • the Ethernet protocol conversion gateway includes:
  • a MAC acquisition module configured to access a new network, obtain a MAC address of the Ethernet protocol conversion gateway from the node server, and a terminal MAC address bound to the Ethernet protocol translation gateway;
  • a MAC adding module configured to receive a data packet or a protocol packet sent by the new network, add a MAC address of the Ethernet protocol conversion gateway and a MAC address of the target terminal in the data packet or the protocol packet, and then send the data address to the local area Ethernet ;
  • a MAC deletion module configured to receive a data packet or a protocol packet sent by the local area network, remove the MAC address of the Ethernet protocol conversion gateway in the data packet or the protocol packet, and the MAC address of the source terminal, and then send the data to the new network;
  • the target terminal and the source terminal follow a novel network protocol.
  • the data packet sent by the novel network and the data packet sent by the Ethernet include a address of the new network at both ends of the transmission, and the address is a source address of the data packet. And destination address.
  • the Ethernet protocol conversion gateway further includes: a mapping relationship acquisition module, configured to obtain an Ethernet protocol conversion gateway after the Ethernet protocol conversion gateway accesses the new network The mapping between the terminal MAC address and the address of the terminal in the novel network; the MAC adding module receives the data packet sent by the new network, and adds the corresponding target in the data packet according to the mapping between the destination address and the MAC address of the data packet. Terminal MAC address.
  • a mapping relationship acquisition module configured to obtain an Ethernet protocol conversion gateway after the Ethernet protocol conversion gateway accesses the new network The mapping between the terminal MAC address and the address of the terminal in the novel network
  • the MAC adding module receives the data packet sent by the new network, and adds the corresponding target in the data packet according to the mapping between the destination address and the MAC address of the data packet. Terminal MAC address.
  • the binding relationship between the terminal MAC address and the Ethernet protocol conversion gateway is preset in the node server when the terminal and the Ethernet protocol conversion gateway are sold.
  • the embodiment of the invention also discloses a node server, including:
  • a service request receiving module configured to receive a request for a current service, where the request includes information of a source terminal and a target terminal;
  • a notification module configured to notify, according to the request of the current service, the access switch that is connected to the source terminal and the target terminal in the internal packet address table, and set the access switch that is directed by the data packet of the secondary service Downstream port.
  • the data packet may be a unicast data packet.
  • the data packet address table is a unicast data packet.
  • the address table when the unicast service communicates, the destination address of the data packet is the receiver address.
  • the request for the current service is a request submitted by the source terminal to establish a unicast service communication with the target terminal
  • the notification module includes:
  • a first communication link acquisition sub-module configured to acquire communication link information of the current service according to the request of the current service, where the communication link information includes: the downlink port information of the access switch connected to the target terminal;
  • the port configuration protocol packet sending submodule is configured to send a port configuration protocol packet to the access switch according to the communication link information.
  • the request for the current service includes a request submitted by the source terminal to establish a unicast service communication with the target terminal
  • the notification module includes:
  • a second communication link acquisition sub-module configured to acquire communication link information of the current service according to the current service request, where the communication link information includes: downlink port information of the access switch connected to the source terminal, and, Downstream port information of the target terminal;
  • the port configuration protocol packet sending submodule is configured to send a port configuration protocol packet to the access switch according to the communication link information.
  • the request for the current service includes service type information, service content information, and an access network address of the source terminal, where the service content information includes a service number;
  • a communication link acquisition submodule or a second communication link acquisition submodule node server further includes:
  • a target terminal address extracting unit configured to extract an access network address of the target terminal in the preset content-address mapping table according to the service number
  • a link calculation unit configured to acquire communication link information of the current service according to the service type information, the source terminal, and the access network address of the target terminal.
  • the communication link information may be a one-way communication link information, for example, the source terminal initiates a unicast service request to the target terminal, or the target terminal initiates a unicast service request to the source terminal; or
  • the communication link information may also be two-way communication link information, for example, the source terminal and the target terminal initiate a unicast service request to the opposite end.
  • the node server In the process of establishing a communication connection, the node server notifies the source terminal and the target terminal, and determines whether the current communication link can be adopted according to the response of the target terminal, that is, in a preferred embodiment of the present invention, the node server further Includes:
  • a menu protocol packet sending module configured to send a menu protocol package to the source terminal and the target terminal;
  • the response protocol packet receiving module is configured to receive a response protocol packet sent by the target terminal for the menu protocol packet.
  • the node server when notifying the access switch to configure the data packet address table, may further send a service processing command to the source terminal and the target terminal, respectively, to notify the source terminal and the target terminal to perform corresponding according to the service processing command. Operation. That is, in a preferred embodiment of the present invention, the node server further includes:
  • the service processing command sending module is configured to separately send a service processing command to the source terminal and the target terminal, and notify the source terminal and the target terminal to perform a corresponding operation according to the service processing command.
  • the data packet may be a multicast data packet.
  • the data packet address table is multicast data. Packet address table. The destination address of the data packet when the multicast service communicates is the multicast address.
  • the request for the current service includes a request for a multicast service communication initiated by the target terminal
  • the notification module includes:
  • a third communication link acquisition sub-module configured to acquire communication link information of the current service according to the request of the current service, where the communication link information includes: the downlink port information of the access switch connected to the target terminal;
  • the port configuration protocol packet sending submodule is configured to send a port configuration protocol packet to the access switch according to the communication link information.
  • the multicast service for the source terminal further initiates the multicast service, for example, the source terminal sends a live broadcast, and the request for the current service further includes a request for initiating the multicast service communication submitted by the source terminal, where the notification module includes:
  • a fourth communication link acquisition sub-module configured to acquire communication link information of the current service according to the current service request, where the communication link information includes: downlink port information of the access switch connected to the source terminal;
  • the port configuration protocol packet sending submodule is configured to send a port configuration protocol packet to the access switch according to the communication link information.
  • the request for requesting the multicast service communication initiated by the target terminal includes the service type information, the service content information, and the access network address of the target terminal; wherein the service content information Include the service number;
  • the third communication link acquisition submodule further includes:
  • the source terminal address extracting unit is configured to extract an access network address of the source terminal in the preset content-address mapping table according to the service number;
  • a multicast address first allocation unit configured to acquire a multicast address corresponding to the source terminal, and allocate the multicast address to the target terminal;
  • a first link calculation unit configured to use the service type information, the source terminal, and the target end
  • the access network address of the end acquires the communication link information of the downlink of the current multicast service.
  • This embodiment mainly relates to a communication link establishment process when a target terminal requests a multicast service, and thus its communication link is a downlink for transmitting multicast data to a target terminal.
  • the request for initiating the multicast service communication submitted by the source terminal includes service type information, service content information, and an access network address of the source terminal, where
  • the service content information includes a service number
  • the fourth communication link acquisition submodule further includes:
  • a second allocation unit of the multicast address configured to allocate a multicast address to the source terminal according to the request
  • a second link calculation unit configured to obtain communication link information of the current multicast service downlink according to the service type information, and the node server and the access network address of the source terminal.
  • This embodiment mainly relates to a communication link establishment process when a source terminal initiates multicast, and thus the communication link is a downlink for transmitting multicast data to the source terminal.
  • the node server further includes:
  • a first sending module configured to send a service processing command to the target terminal, to notify the target terminal to perform a corresponding operation according to the service processing command;
  • the second processing module of the service processing command is configured to send a service processing command to the source terminal, and notify the source terminal to perform a corresponding operation according to the service processing command.
  • the node server further includes:
  • a downlink guiding module configured to, according to a setting of a downlink protocol packet address table preset therein, to connect the port configuration protocol packet to a corresponding access switch by connecting a downlink port of the corresponding access switch;
  • the downlink protocol packet address table is provided with a downlink port that is forwarded by a protocol packet whose destination address is a lower-level access network device address.
  • the node server further includes: a port release notification module, configured to send a port release command to the access switch that the source terminal and the target terminal are commonly connected after completing the current service.
  • the node server further includes:
  • a service processing end command sending module configured to send a service processing end command to the source terminal and/or the target terminal
  • the source terminal includes a first end processing module, configured to end service processing according to the service processing end command;
  • the target terminal includes a second end processing module for ending the service processing according to the service processing end command.
  • the node server is further provided with an address information table in which the address occupation information, the device identification information, and the device resource information are recorded.
  • the node server After completing the current service, the node server further includes:
  • the address information table update module is configured to modify the content in the preset address information table, where the modifying includes updating the address occupation information of the port of the access switch to be unused.
  • the embodiment of the present invention further discloses an access switch, where the access switch is connected to the source terminal and the target terminal, and the access switch includes:
  • An interaction module configured to receive a port configuration notification sent by the node server for the current service request
  • a port configuration module configured to set, in the internal data packet address table according to the port configuration, a downlink port of the access switch that is directed by the data packet of the secondary service;
  • the first port guiding module is configured to: after receiving the uplink data packet of the current service sent by the source terminal, according to the setting of the internal data packet address table, direct the data packet to the corresponding downlink port, and transmit the data packet through the downlink port To the target terminal.
  • the communication between the terminals may be bidirectional, that is, in addition to the application scenario in which the source terminal sends a data packet to the target terminal, in the embodiment of the present invention, the access switch further includes:
  • a second port guiding module configured to: after receiving the uplink data packet of the current service sent by the target terminal, according to the setting of the internal data packet address table, direct the data packet to the corresponding A row port is transmitted to the source terminal through the downlink port.
  • the data packet may be a unicast data packet.
  • the data packet address table is a unicast data packet.
  • the address table when the unicast service communicates, the destination address of the data packet is the receiver address.
  • the port configuration notification sent by the node server is encapsulated in the port configuration protocol.
  • the port configuration protocol packet includes downlink port information that is connected to the target terminal by the access switch;
  • the port configuration module of the access switch includes:
  • the first port configuration submodule is configured to set, according to the port configuration protocol packet, a destination port whose destination address is a downlink port directed by the target terminal in the internal packet address table.
  • the port configuration notification sent by the node server is encapsulated in the port configuration protocol.
  • the port configuration protocol packet includes downlink port information of the access source connected to the source terminal, and downlink port information of the target terminal;
  • the port configuration module of the access switch includes:
  • a second port configuration submodule configured to set, in the data packet address table of the port configuration protocol packet, a downlink port whose destination address is a source terminal, and a destination address of the target terminal Downstream port.
  • the node server In the process of establishing a communication connection, the node server notifies the source terminal and the target terminal, and determines whether the current communication link can be adopted according to the response of the target terminal, that is, in a preferred embodiment of the present invention, when the access
  • the access switch further includes:
  • the first menu package guiding module is configured to direct the menu protocol packet sent by the node server to the source terminal according to the setting of the internal protocol packet address table preset therein;
  • the access switch is an access switch connected between the node server and the target terminal, the access switch further includes:
  • a second menu package guiding module configured to direct the menu protocol packet sent by the node server to the target terminal according to the setting of the internal protocol packet address table preset therein;
  • the downlink protocol packet address table is configured with a protocol packet directed to the CPU module whose destination address is the access network address of the current access switch; and a port directed by the protocol packet whose destination address is the address of the other access network device. .
  • the data packet may be a multicast data packet.
  • the data packet address table is multicast data. Packet address table. The destination address of the data packet when the multicast service communicates is the multicast address.
  • the current service includes a multicast service communication initiated by the target terminal, and the node server sends
  • the port configuration notification is encapsulated in a port configuration protocol packet, where the port configuration protocol packet includes downlink port information of the access switch connected to the target terminal;
  • the port configuration module of the access switch includes:
  • the third port configuration sub-module is configured to, according to the port configuration protocol packet, set a data packet whose destination address is a multicast address to the downlink port in the internal packet address table.
  • the multicast service for the source terminal further initiates the multicast service, for example, the source terminal initiates the live broadcast, and the current service further includes the multicast service communication initiated by the source terminal; and the port configuration protocol packet sent by the node server is further The downlink switch information of the source switch connected to the access switch is included;
  • the port configuration module of the access switch includes:
  • a fourth port configuration submodule configured to set, according to the port configuration protocol packet, a data packet whose destination address is a multicast address in the internal packet address table to the downlink port as a specific multicast communication service implementation
  • the request for the current service is recorded in the service request protocol packet, and when the access switch is connected to the source terminal and the node, When accessing the switch between the devices, the access switch further includes:
  • An uplink guiding module configured to direct, by the uplink port of the access switch, the service request protocol packet to the node server according to the setting of an internal protocol packet address table preset therein;
  • the uplink protocol packet address table is configured with an uplink port that is forwarded by the protocol packet of the node server.
  • the access switch further includes:
  • the port release processing module is configured to release the port that is set by the current service data packet in the internal packet address table according to the port release command sent by the node server.
  • the node server of the present invention mainly includes a network interface module, a switching engine module, a CPU module, and a disk array module.
  • the access switch of the present invention mainly includes a network interface module (a downlink network interface module).
  • the uplink network interface module the switching engine module
  • the CPU module the uplink network interface module
  • the switching engine module is for different packets (protocol packets, data packets, etc.)
  • the address table to be checked is different, and the obtained package information is different; or, for example, if the CPU module receives the packet, it may be an address table, or may parse the packet and generate a response packet. Therefore, in order to enable a person skilled in the art to better understand the present invention, in the embodiment of the present invention, the modules involved in the network access system of the node server, the access switch, and the access network device of the present invention are mainly described from a functional perspective. In essence, however, these functional modules correspond to actual hardware modules. Compared with the prior art, the present invention has the following advantages:
  • the service communication process of the source terminal and the target terminal jointly connected to the same access switch is first notified by the node server that the access switch sets the data packet of the current service in the internal packet address table of the access switch.
  • the corresponding downlink port of the access switch transmits the data packet, that is, the source terminal and the target terminal can directly perform service communication under the access switch that they are connected to each other, without uploading the data packet to the node server, and then sending the corresponding server to the corresponding server.
  • the terminal effectively saves bandwidth and routing resources.
  • the present invention transmits the service data transmission path by means of the master server in the case of initiating a service request (in the process of protocol interaction established by the communication process) and in the manner of matching the service request for each access switch.
  • the implementation setting can be performed directly according to the transmission path during the transmission of the data packet, without using the solution of the existing IP protocol, and each data packet negotiates the transmission route by itself.
  • the present invention can ensure the stability and smoothness of the transmission path and avoid the delay of multimedia services.
  • the present invention adopts a method of matching tables for all data services, and sets a path in advance, so as to meet the needs of national information security. For example, for national information security, it needs to monitor some data in the new network. With the method of the present invention, the data transmitted by the service can be easily directed to the monitoring channel to ensure the country. The need for information security.
  • the access switch does not need to perform routing calculation for each data packet, and does not need to maintain the topology of the network device around it, and only needs to perform guided transmission according to the configured packet address table, and
  • the guiding process can be implemented by hardware, which can greatly improve the guiding efficiency of the switch, and can greatly reduce the computing requirements of the switch and save hardware resources.
  • FIG. 1 is a schematic diagram showing the hardware structure of a node server according to the present invention.
  • FIG. 2 is a schematic structural diagram of hardware of an access switch according to the present invention.
  • FIG. 3 is a schematic diagram showing the hardware structure of an Ethernet protocol conversion gateway according to the present invention.
  • FIG. 4 is a schematic diagram of connection of a node server, an access switch, and a terminal according to the present invention
  • FIG. 5 is a schematic diagram of connection of another node server, an access switch, and a terminal according to the present invention
  • FIG. 6 is a flowchart of an Ethernet co-transfer gateway accessing a novel network according to an embodiment of the present invention
  • FIG. 7 is a flowchart of a terminal accessing a novel network according to an embodiment of the present invention.
  • the inventor of the present invention believes that the sufficient conditions for realizing the quality assurance of the whole network of the present invention are as follows:
  • the "Effort Efforts" mechanism in the core theory of IP Internet will inevitably lead to uneven network traffic and frequent packet loss.
  • the TCP protocol uses the network packet loss status to regulate the transmission traffic.
  • the inventor of this patent believes that the current various QoS methods are based on a false assumption. On. Based on this assumption, the solution to QoS is to provide priority for video traffic. But the fact is, because the network traffic required by different media forms is extremely uneven, as long as a few people use video services, the video traffic on the network will occupy the absolute main body.
  • IP Internet is like a country road in the early days. It does not require traffic police in a simple town. However, in the bustling metropolis, the traffic lights and traffic police on some lively sections can't control the chaos. It is difficult to determine the time to travel, just like today's IP Internet.
  • the invention is like a highway, does not require police and traffic lights, cement-separated lanes and overpasses ensure that the car is on a prescribed road. According to the experience of the California Department of Transportation, the way to avoid traffic jams on highways is to close the entrance ramp.
  • the TV of the embodiment of the present invention can achieve a packet loss rate of one millionth of a million under heavy load flow.
  • Computer files and streaming media are two distinct forms of media that are mutually exclusive.
  • the network theory and practice of the present invention reveals two outcomes:
  • the present invention is a hundred times better than the IP Internet.
  • Embodiments of the present invention provide a complete transparent bearer IP Internet solution.
  • the PSTN telephone network uses a strict synchronization mechanism, and network congestion does not occur until the traffic is 100% full.
  • network congestion does not occur until the traffic is 100% full.
  • it is still linked.
  • network traffic can be close to the limit without packet loss. Since it occupies more than 90% of the video media stream in future network traffic, it has its own characteristics. Therefore, the Internet quality assurance approach of the present invention, which is mainly aimed at the video service, naturally eliminates the unevenness of the source traffic, especially in the sense of preventing the packet loss phenomenon of the network switch under heavy load conditions.
  • a connection-oriented circuit is established by using an improved Ethernet, and a fixed length data packet is uniformly used in the entire network. As long as the time interval of sending packets is changed, a media stream of any bandwidth can be obtained.
  • the Internet of the present invention requires that the terminal design must have a current sharing capability.
  • the node server issues a pass to the network switch, and only allows the user data packet to pass through with a fine time precision. For user terminals designed to meet the specified requirements, the pass is completely transparent. Under the above premise, the network practice has obtained satisfactory results, and the switch of the present invention can obtain a overloaded packet loss rate of more than one million in a condition of 90% bandwidth utilization.
  • the new network is a centralized control network structure.
  • the network can be a tree network, a star network, a ring network, etc., but on this basis, a centralized control node is needed in the network to control the entire network.
  • the new network is divided into two parts: the access network and the metropolitan area network.
  • the devices in the access network can be divided into three categories: node servers, access switches, and terminals (including various set-top boxes, code boards, memories, etc.).
  • the node server is a node in the access network that functions as a centralized control, and can control the access switch and the terminal.
  • the node server can be directly connected to the access switch or directly connected to the terminal.
  • devices in the metropolitan area network can be divided into three categories: metro servers, node switches, and node servers.
  • the node server is the node server of the access network part, that is, the node server belongs to both the access network part and the metropolitan area network part.
  • the metropolitan area server is a node in the metropolitan area network that has centralized control functions, and can control node switches and node servers.
  • the metro server can be directly connected to the node switch or directly to the node server. It can be seen that the whole new network is a layered and centralized control network structure, and the network controlled by the node server and the metropolitan area server can be various structures such as a tree type, a star type, and a ring type.
  • the devices in the novel network system of the present invention can be mainly classified into three categories: servers, switches (including Ethernet gateways), terminals (including various set top boxes, code boards, memories, etc.).
  • the new network can be divided into a metropolitan area network (or national network, global network, etc.) and an access network as a whole.
  • the devices in the access network can be mainly divided into three categories: node server, access Switches (including Ethernet gateways), terminals (including various set-top boxes, code boards, memories, etc.).
  • each access network device is:
  • the network interface module 101, the switching engine module 102, the CPU module 103, and the disk array module are mainly included;
  • the packets from the network interface module 101, the CPU module 103, and the disk array module 104 all enter the switching engine module 102; the switching engine module 102 performs an operation of checking the address table 105 for the incoming packet, thereby obtaining the packet guiding information; The packet's navigation information stores the packet in the queue of the corresponding packet buffer 106; if the packet buffer 106 is nearly full, it is discarded; the switching engine module 102 polls all packet buffer queues, and forwards if the following conditions are met: : 1) The port send buffer is not full; 2) The queue packet counter is greater than zero.
  • the disk array module 104 mainly implements control of the hard disk, including operations such as initialization, reading and writing of the hard disk.
  • the CPU module 103 is mainly responsible for protocol processing with the access switch and the terminal (not shown), and the address table 105 is The configuration of the downlink protocol packet address table, the uplink protocol packet address table, and the packet address table, and the configuration of the disk array module 104.
  • the network interface module (the downlink network interface module 201, the upstream network interface module 202), the switching engine module 203, and the CPU module 204 are mainly included;
  • the packet (uplink data) coming in by the downlink network interface module 201 enters the packet detecting module 205; the packet detecting module 205 detects whether the packet destination address (DA), the source address (SA), the packet type, and the packet length meet the requirements, if If yes, the corresponding stream identifier (stream-id) is assigned and enters the switching engine module 203, otherwise discarded; the incoming packet (downlink data) of the upstream network interface module 202 enters the switching engine module 203; the data entered by the CPU module 204 The packet enters the switching engine module 203; the switching engine module 203 performs an operation of checking the address table 206 for the incoming packet, thereby obtaining the packet guiding information; if the packet entering the switching engine module 203 is the downlink network interface to the upstream network interface, The packet is stored in the queue of the corresponding packet buffer 207 in conjunction with the stream identifier (stream-id); if the packet buffer 207 is queued If the packet entering the switching engine module 203 is not the down
  • the switching engine module 203 polls all packet buffer queues, which are divided into two cases in the embodiment of the present invention:
  • the queue is the downlink network interface to the uplink network interface, the following conditions are met: 1) the port transmission buffer is not full; 2) the queue packet counter is greater than zero; 3) obtaining the token generated by the rate control module ;
  • the queue is not the downstream network interface to the upstream network interface, the following conditions are met for forwarding: 1) the port transmission buffer is not full; 2) the queue packet counter is greater than zero.
  • the rate control module 208 is configured by the CPU module 204 to generate a token for all downlink network interfaces to the packet buffer queue of the uplink network interface in a programmable interval to control the bit rate of the uplink forwarding.
  • the CPU module 204 is primarily responsible for protocol processing with the node server, configuration of the address table 206, and configuration of the rate control module 208.
  • FIG. 3 it mainly includes a network interface module (downlink network interface module 31, uplink network interface module 32), a switching engine module 33, a CPU module 34, a packet detecting module 35, a code rate control module 38, an address table 36, and a packet.
  • the buffer 37 and the MAC adding module 39 and the MAC deleting module 40 are the network interface module (downlink network interface module 31, uplink network interface module 32), a switching engine module 33, a CPU module 34, a packet detecting module 35, a code rate control module 38, an address table 36, and a packet.
  • the buffer 37 and the MAC adding module 39 and the MAC deleting module 40 The buffer 37 and the MAC adding module 39 and the MAC deleting module 40.
  • the incoming packet of the downlink network interface module 31 enters the packet detecting module 35; the packet detecting module 35 detects the Ethernet MAC DA of the data packet, the Ethernet MAC SA, the Ethernet length or frame type, the new mesh address DA, and the new network. Whether the source address SA, the new network packet type, and the packet length meet the requirements, if yes, assign a corresponding stream identifier (stream-id); then, the MAC delete module 40 subtracts the MAC DA, MAC SA, length or frame type (2byte), and enter the corresponding receive buffer, otherwise discard;
  • the downlink network interface module 31 detects the transmission buffer of the port, and if there is a packet, learns the Ethernet MAC DA of the corresponding terminal according to the new network address DA of the packet, and adds the terminal.
  • the utility model mainly comprises a network interface module, a service processing module and a CPU module; for example, the set top box mainly comprises a network interface module, an audio and video codec engine module and a CPU module; the coding board mainly comprises a network interface module, an audio and video coding engine module and a CPU module; It mainly includes network interface module, CPU module and disk array module.
  • the devices in the metropolitan area network can be mainly divided into two categories: node server, node switch, and metro server.
  • the node switch mainly includes a network interface module, a switching engine module, and a CPU module;
  • the metropolitan area server mainly includes a network interface module, a switching engine module, and a CPU module.
  • the data packet of the access network mainly includes the following parts: destination address (DA), source address (SA), reserved byte, payload (PDU), CRC.
  • the data packets of the access network mainly include the following parts:
  • the destination address (DA) consists of 8 bytes (byte), the first byte indicates the type of packet (such as various protocol packets, multicast packets, unicast packets, etc.), and there are up to 256 possibilities.
  • the second byte to the sixth byte are the metropolitan area network addresses, and the seventh and eighth bytes are the access network addresses;
  • SA source address
  • DA destination address
  • the reserved byte consists of 2 bytes;
  • the CRC consists of 4 bytes and its calculation method follows the standard Ethernet CRC algorithm.
  • the topology of the metropolitan area network is a pattern. There may be two or even more than two connections between the two devices, that is, the node switch and the node server, the node switch, and the node switch, the node switch, and the node server may exceed 2 kinds of connections.
  • the metropolitan area network (LAN) device is unique. To accurately describe the connection between the metropolitan area network devices, the parameter: label is introduced in the embodiment of the present invention to uniquely describe a metropolitan area network device.
  • the definition of the label in this manual is similar to the definition of the label of the MPLS (Multi-Protocol Label Switch). If there are two connections between the device A and the device B, then the data packet is from device A to device B. 2 tags, the packet has 2 tags from device B to device A. The tag is tagged and tagged. Assume that the tag of the packet entering device A (inbound tag) is 0x0000, and the tag (outbound tag) when the packet leaves device A may become 0x0001.
  • the access network process of the metropolitan area network is the network access process under centralized control, which means that the address allocation and label allocation of the metropolitan area network are dominated by the metropolitan area server, and the node switch and the node server are passively executed.
  • the label assignment with MPLS is different.
  • the label assignment of MPLS is the result of mutual negotiation between the switch and the server.
  • the metropolitan area network data packet mainly includes the following parts:
  • the format of the label can be defined as follows:
  • the label is 32 bits, of which the upper 16 bits are reserved, only the lower 16 bits, and its position is between the reserved bytes of the data packet and the ayload. 3, the new network implementation
  • a downlink protocol packet (a protocol packet sent by the node server to the access switch and the terminal); an uplink protocol packet (by the access switch, the terminal) a protocol packet that responds to the node server); a unicast packet;
  • the address of the access network is 16 bits in total, so the total number of access switches and terminals that can be accessed is 65536. It is assumed that the datagram type of the downlink protocol packet is "1000 0000" (binary), that is, 0x80 (hexadecimal). The datagram type of the upstream protocol packet is "0000 1000" (binary), which is 0x08 (hexadecimal). The datagram type of the unicast packet is "0001 0000" (binary), which is 0x10 (16). In hexadecimal), the datagram type of the multicast packet is "0111 1000" (binary), which is 0x78 (hexadecimal). By combining the same items, the 8-bit long address table can be mapped to a 2-bit long address table. , E.g
  • the output of the address table indicates the packet-oriented port.
  • one of the access switches ⁇ -008 has one uplink 100 Mbps network port, eight downlink 100 Mbps network ports, and one CPU module interface. If the eight downlink 100M network ports are defined as ports 0 to 7, respectively, the CPU module interface is defined as port 8, and one upstream 100M network port is defined as port 9, which requires a total of 256K X lObit addresses. Table, such as the loss of the address table The output "00 0000 0001" indicates packet-oriented port 0, "11 0000 0000" indicates packet-oriented port 8, port 9, and so on.
  • port 9 has a packet with its destination address (DA) of 0x8056 0x1500 0x0000 0x55aa, then its packet type is 0x80, and the access network address is 0x55aa, then the table 0 is checked according to the table check rule. That is, the address is "00 0101 0101 1010 1010", and the output of the address table corresponding to this address is "01 0000 0000", indicating that the packet is directed to port 8.
  • DA destination address
  • the set-top box STB-0 sends a service request protocol packet
  • the DA (destination address) of the packet is the book 0x0800 0x0000 0x0000 0x0000 (that is, the address of the MSS-400)
  • the SA is 0x0000 0x0000 0x0000 0x0009, and in the package, it may also include reserved 0x0000 (reserved words), the PDU part is shown in the following table:
  • the program number involved in the service application is all placed in the service parameters, for example
  • the month parameter is SERVICE_TYPE_ TELEPHONE_REQUEST or SERVICE_TYPE_ TELEPHONE_DIRECT.
  • the node server MSS-400 determines, according to the content of the packet, the application (service type) for receiving the visual communication, and checks the CAM table (content-address mapping table) according to the service number to know that the called party (target terminal) is STB-1. According to the internal address information table, the link topology involved in the service is known, and the link is allowed to be allowed, and both parties can communicate.
  • the menu protocol packet is then sent to the calling party (STB-0) and the called party (STB-1), respectively, and waits for the called party to answer:
  • DA 0x8000 0x0000 0x0000 0x0009
  • SA 0x0000 0x0000 0x0000
  • reserved 0x0000 the PDU part is shown in the following table:
  • the two menu protocol packages are respectively directed to the set top box STB.
  • STB— 0 and STB— 1 the called STB 1 issues an application SERVICE — TYPE — PERMISSION is connected to STB — 1 and communicates with the node server MSS-400.
  • the DA of the packet is 0x0800 0x0000 0x0000 0x0000, SA 0x0000 0x0000 0x0000 0x0012, reserved 0x0000, the service parameter is SERVICE TYPE PERMISSION, the PDU part is shown in the following table:
  • the response protocol packet is directed to the node server MSS-400, and the node server MSS-400 determines to receive the application for accepting the visual communication according to the content of the packet, according to
  • the service number check CAM table knows that the called party is STB-1.
  • the node server MSS-400 knows the link topology involved in the service, and determines that the link is allowed, and the two parties can communicate.
  • the node server MSS-400 sends port configuration protocol packets, current uplink and downlink, to all access switches on the uplink (calling path) and downlink (called path). Only the access switch BX-008-1, which is connected to the set-top box STB-0 and STB-1, is required to simultaneously open the uplink of the opposite address and the downlink of its own address.
  • the first port configuration protocol packet DA is 0x8000 0x0000 0x0000 0x0002
  • SA is 0x0000 0x0000 0x0000 0x0000, reserved 0x0000
  • the PDU part is as follows:
  • the first port configuration protocol packet DA is 0x8000 0x0000 0x0000 0x0002
  • SA is 0x0000 0x0000 0x0000 0x0000, reserved 0x0000
  • the PDU part is shown in the following table:
  • the encoding type is as shown in the following table:
  • set-top box STB-0 sends a unicast data packet to the set-top box STB-1, the DA of the package is
  • SA is 0x0000 0x0000 0x0000 0x0009;
  • Set-top box STB-1 sends a unicast data packet to the set-top box STB-0.
  • the DA of the packet is 0x1000 0x0000 0x0000 0x0009
  • SA is 0x0000 0x0000 0x0000 0x0012;
  • STB 0 is 0x6666 0x6666 0x6666
  • access terminal BX 008-1 port 3 is connected to a set-top box STB-1 (access network address The number of STB-1 is 0x8888 0x8888 0x8888.
  • the set-top box STB-0 requests to initiate a live broadcast to the node server MSS-400.
  • the steps are as follows: Sl, the set-top box STB-0 sends a service request protocol packet for initiating a live broadcast, the DA of the packet is 0x0800 0x0000 0x0000 0x0000, SA is 0x0000 0x0000 0x0000 0x0009, reserved 0x0000 (Reserved words), the PDU part is shown in the following table:
  • the service request protocol packet is directed to the node server MSS- 400, the node server MSS-400 judges according to the content of the packet, receives the application (service type) for initiating the live broadcast, and checks the CAM table (content-address mapping table) according to the service number to know that the user (source terminal) is STB_0, according to The internal address information table knows the link topology involved in the service, determines that the link is allowed, and can initiate a live broadcast, so the assigned multicast address is 0x0008.
  • the node server sends a port configuration protocol packet to all access switches on the current communication link, and requires the uplink of the opposite address and the downlink of the own address to be simultaneously opened. At this time, through the link topology judgment, it is known that only the access switch BX-008-l o is currently configured.
  • the node server MSS-400 sends a port configuration protocol packet to the access switch BX-008-1:
  • the DA of the packet is 0x8000 0x0000 0x0000 0x0002
  • SA is 0x0000 0x0000 0x0000 0x0000, reserved 0x0000 (reserved word)
  • the PDU part is shown in the following table:
  • the node server MSS-400 sends a packet to the set-top box STB-0 (service processing command, this example is a codec command):
  • the DA of the packet is 0x8000 0x0000 0x0000 0x0009
  • SA is 0x0000 0x0000 0x0000 0x0000, reserved 0x0000
  • the PDU part is shown in the following table:
  • the port configuration protocol packet sent to the access switch BX-008-1 will be directed. To ⁇ -008-1.
  • the BX-008-1 configures its own No. 3 table as follows:
  • the packet sent to the set-top box STB-0 is directed to STB-0.
  • STB-0 starts encoding and decoding according to the contents of the packet, and starts receiving and transmitting multicast data.
  • the set-top box STB-0 sends a multicast packet
  • the DA of the packet is 0x7800 0x0000 0x0000 0x0008 (multicast address);
  • SA is 0x0000 0x0000 0x0000 0x0009;
  • the multicast data packet enters the access switch BX-008-1, and the switching engine module of the access switch BX-008-1 checks the table No. 3 according to the combined address field, and the address of the table is "11 0000 0000 1000"
  • the set-top box STB-1 applies to the node server MSS-400 to view the live broadcast, the number is 0x6666 0x6666 0x6666, the steps are as follows:
  • Sl, set-top box STB-1 sends a service request protocol packet for watching live broadcast
  • the DA of the packet is 0x0800 0x0000 0x0000 0x0000
  • SA is 0x0000 0x0000 0x0000 0x0012, reserved 0x0000
  • the PDU part is as shown in the following table:
  • the service request protocol packet is directed to the node server MSS- 400, the node server MSS-400 judges that the application for watching the live broadcast is received according to the content of the package, and the CAM table according to the service number knows that the initiator (source terminal) is STB 0, according to the internal address information table, it is known this time.
  • the link topology involved in the service determines that the link is allowed, and the live broadcast can be performed. Therefore, the assigned multicast address (corresponding to the multicast address assigned to the source terminal) is 0x0008.
  • the node server sends a port configuration protocol packet to all access switches on the current communication link, and requires simultaneous opening of the address of the other party address and The downlink of its own address.
  • the node server MSS-400 sends a port configuration protocol packet to the access switch BX-008-1: DA is 0x8000 0x0000 0x0000 0x0002, SA is 0x0000 0x0000 0x0000, reserved 0x0000, the PDU part is shown in the following table:
  • the node server MSS-400 sends a packet to the set-top box STB-1 (service processing command, this example is a codec command):
  • the DA of the packet is 0x8000 0x0000 0x0000 0x0012
  • SA is 0x0000 0x0000 0x0000 0x0000, reserved 0x0000
  • the PDU part is shown in the following table:
  • the BX-008-1 will be directed to the access switch ⁇ -008-1.
  • the packet sent to the set-top box STB-1 is directed to the STB. -1.
  • STB-1 receives multicast data and decodes according to the contents of the packet.
  • STB-0 sends a multicast packet
  • the DA of the packet is 0x7800 0x0000
  • SA 0x0000 0x0000 0x0008 (multicast address);
  • the multicast data packet enters the access switch BX-008-1, and the switching engine module of the access switch BX-008-1 checks the table No. 3 according to the combined address field, and the address of the table is "11 0000 0000 1000"
  • the No. 0 table and the No. 1 table are all configured during the network access process.
  • the following provides an example of an access network device that is equipped with a table No. 0 and a table No. 1 during the network access process:
  • the address of the access network can be set to 16 bits, and all access network devices have unique access network addresses (including set-top boxes, access switches, Memory, even the node server itself).
  • an address information table can be maintained in the CPU module of the node server. The size of the table is 2 to the 16th power, that is, 64K, and the entries of each table.
  • device resource description information for example, if the device is an access switch, the access network address of the device connected to the network port, and the uplink and downlink traffic of each network port; if the device is a memory, its The access network address of the device connected to the network port, the count of its read and write channels, and the upstream and downstream traffic counts of the network port; etc., all of this information is used to provide decision-making basis for the service process, and will be modified in each service flow. these messages.
  • MSS-400 server After the MSS-400 server is powered on, initialize the hardware, obtain the default metropolitan area network address (assumed to be 0x00 0x0000 0x0000), import the configuration file from the hard disk to the CPU memory (such as the registration information of the switch, the registration information of the terminal, etc.), MSS -400 server initialization address information table, all cleared (indicating that all addresses are not used), MSS-400 server configures its own access network address to 0x0000, that is, the 0x0000 item of the address information table is configured as follows: • Address occupation Descriptor: "10" indicates that this address is used;
  • This node server has eight downstream 100M network ports defined as port 0 to port 7, one CPU module interface is defined as port 8, and one disk array interface is defined as port 9. 1 uplink Gigabit optical port is defined as port 10, the node server model is MSS-400, the access network address of the device connected to its network port is not allocated, and the uplink and downlink traffic count of each network port is 0;
  • the next available address in the address information table is 0x0001;
  • MSS-400 server initialization 0, 1, 2, 3 table:
  • ⁇ Configuration No. 0 is "000 0000 0000", that is, all downlink protocol packet transmissions are closed;
  • Configuration No. 1 is "001 0000 0000", that is, all upstream protocol packets are directed to the CPU; • Configuration No. 2 and No. 3 are "000 0000 0000", that is, all single multicast packets are transmitted and closed;
  • the MSS-400 server knows that it has 8 downlink ports, and the next available address is 0x0001. Therefore, it configures eight entries of the 0th table as:
  • S4, MSS-400 server destination address is 0x8000 0x0000 0x0000 0x0001, 0x8000 0x0000 0x0000 0x0002, 0x8000 0x0000 0x0000 0x0003, 0x8000 0x0000 0x0000 0x0004, 0x8000 0x0000 0x0000 0x0005, 0x8000 0x0000 0x0000 0x0006, 0x8000 0x0000 0x0000 0x0007, 0x8000 0x0000 0x0000 0x0008 query packet (SA is 0x0000 0x0000 0x0000 0x0000), according to the configuration of its table 0, the query packet will be directed to ports 0 to 7; at this time, the 0x0001 to 0x0008 items of the address information table are configured. to make:
  • the next available address of the address information table is 0x0009;
  • the S6 and BX-008-0 switches After receiving the query packet, the S6 and BX-008-0 switches receive the query packet to the CPU module according to the configuration of the table No. 0, and the CPU module parses the query packet and generates a response packet.
  • the response contains the registration information of the access switch) and is sent to the MSS-400 server.
  • the DA of the packet is 0x0800 0x0000 0x0000 0x0000
  • the SA is 0x0000 0x0000 0x0000 0x0001;
  • the MSS-400 server After receiving the response packet sent by the BX-008-0 switch, the MSS-400 server compares the source address (SA) of the response packet and the device type to know that the port 0 is connected to an access switch, and then The information of the access switch is found in the registration information table of the node server, and the network access command is sent to the access switch (informing that the access network address is 0x0001);
  • the BX-008-0 switch After receiving the network access command, the BX-008-0 switch knows that its access network address is 0x0001 and enters the network. Therefore, its 0th table "00 0000 0000 0001" is set to "01 0000 0000", table 0 The other entries are configured as "00 0000 0000", that is, only the downlink protocol packet of the switch is imported into the CPU, and the network access command response is sent to the server;
  • the MSS-400 server receives the incoming command response from the BX-008-0 switch and knows that the BX-008-0 switch has entered the network. Therefore, the 0x0001 item in the address information table of the server is configured as:
  • the access switch has eight downlink 100M network ports defined as port 0 to port 7, and one CPU module interface is defined as port 8, and one uplink 100 Mbps port is defined as 9 No. port, the access switch model is BX-008, the access network address of the device connected to the uplink network port is 0x0000 (ie MSS-400), and the access network address of the device connected to the downlink network port is not allocated.
  • the uplink and downlink traffic counts of each network port are 0;
  • the MSS-400 server will be configured as follows in its table 0:
  • ie destination address (DA) is 0x8000 0x0000 0x0000 OxOOOb port downstream protocol packet oriented port 0;
  • the destination address (DA) is 0x8000 0x0000 0x0000 0x000c of the port downlink protocol packet oriented port 0;
  • ie destination address (DA) is 0x8000 0x0000 0x0000 OxOOOd port downstream protocol packet oriented port 0;
  • the destination address (DA) is 0x8000 0x0000 0x0000 0x000e of the port downlink protocol packet oriented port 0;
  • ie destination address (DA) is 0x8000 0x0000 0x0000 0x000f port downstream protocol packet oriented port 0;
  • ie destination address (DA) is 0x8000 0x0000 0x0000 0x0010 port downstream protocol packet oriented port 0;
  • the MSS-400 server will allocate the packet through the port including the port allocation information, and inform the BX-008-0 switch to do the following configuration in its table No. 0:
  • ie destination address (DA) is 0x8000 0x0000 0x0000 0x0010 port downstream protocol packet is directed to port 7;
  • S10, MSS-400 server destination address (DA) is 0x8000 0x0000 0x0000
  • the port downlink protocol packet will be sequentially directed to the MSS-400 server port 0.
  • the port downlink protocol packet will be sequentially oriented.
  • Ports 0 to 7 of the BX-008-0 switch; and, items 0x0009 to 0x0010 of the address information table in the MSS-400 server are configured to: • Address occupation descriptor: "01" indicates that this address is inactive;
  • the next available address is 0x0011;
  • Sl l, STB-0 receives the port downlink protocol packet from the port 0 of the BX-008-0 switch (that is, the port downlink protocol packet with the destination address of 0x8000 0x0000 0x0000 0x0009), and sends the port uplink protocol packet after receiving the port downlink protocol packet.
  • the DA of the package is 0x0800 0x0000 0x0000 0x0000
  • SA is 0x0000 0x0000 0x0000 0x0009 (port 0 of the switch);
  • the MSS-400 server After receiving the port uplink protocol packet sent by the STB-0 switch, the MSS-400 server knows that the source address (SA) of the uplink protocol packet and the device type know that the port No. 0 of the BX-008-0 is connected to a terminal. Then, the terminal information is found in the registration information table in the server, and the network access command is sent to the terminal (the terminal's access network address is 0x0009);
  • STB-0 After receiving the network access command, STB-0 knows that its access network address is 0x0009 and enters the network, and sends a network access command response to the server. S14.
  • the MSS-400 server receives the incoming network command response sent by STB-0 and knows that the STB-0 switch has entered the network. Therefore, the 0x0009 item of the address information table is configured as:
  • This terminal has an audio and video codec engine, 1 100M network port, the terminal model is STB, and the access network address of the device connected to its network port is 0x0001 (ie BX-008-0) , the uplink and downlink traffic count of its network port is 0;
  • the 0x0001 item of the address information table is configured to:
  • the access switch has eight downlink 100M network ports defined as port 0 to port 7, and one CPU module interface is defined as port 8, and one uplink 100 Mbps port is defined as 9 No. port, the access switch model is BX-008, the access network address of the device connected to the uplink network port is 0x0000 (ie MSS-400), and the access network address of the device connected to the downlink network port 0 is 0x0009. The rest are unassigned, and the uplink and downlink traffic counts of each of its network ports are 0;
  • the MSS-400 server sends a device status query command to this port every second to check whether the STB-0 switch is working normally.
  • the server does not receive the status inquiry response within 6 seconds, it thinks that STB-0 has been removed from the network. Then send the device status query command and continue to send the query packet to the port.
  • BX-008-1 will also enter the network, and its access network address is 0x0002; STB-1 will also enter the network, and its access network address is 0x0012.
  • the present invention transforms the standard Ethernet gateway, making it a special type of access switch. , plays a role of connection conversion between the new network and Ethernet.
  • the modified Ethernet gateway is called an Ethernet protocol transfer gateway.
  • ether The network association gateway is located in the access network part and can be connected to the access switch or directly to the node server.
  • an Ethernet protocol conversion gateway is connected to a standard Ethernet switch (hereinafter referred to as an L2 switch), and an Ethernet switch is connected to the terminal.
  • the data transmission between the novel network and the Ethernet mainly involves the following four data types:
  • Query packet A protocol packet sent by the node server to the access switch, Ethernet protocol conversion gateway or terminal;
  • Response packet A protocol packet that is responded to the node server by the access switch, Ethernet protocol translation gateway, or terminal;
  • the Ethernet Co-Transfer Gateway mainly performs the forwarding of the above four types of data between the new network and the Ethernet.
  • the core implementation ideas are:
  • the Ethernet protocol conversion gateway accesses the new network, and obtains the MAC address of the Ethernet protocol conversion gateway and the terminal MAC address registered under the Ethernet protocol conversion gateway from the node server with centralized control function.
  • the Ethernet protocol conversion gateway receives the data packet or the protocol packet sent by the new network, the MAC address of the Ethernet protocol conversion gateway and the MAC address of the target terminal are added to the data packet or the protocol packet, and then sent to the Ethernet.
  • the Ethernet protocol is used for transmission in the Ethernet; when the Ethernet protocol conversion gateway receives the data packet or protocol packet sent by the Ethernet, the MAC address and the source terminal of the Ethernet protocol conversion gateway in the data packet or the protocol packet are removed.
  • the MAC address is then sent to the new network, which uses the new network protocol for transmission in the new network.
  • the target terminal and the source terminal follow a novel network protocol, so that the target terminal and the source terminal can enter the Ethernet through the MAC address, and enter the new network by following the new network protocol, thereby implementing two different types of networks. Compatible transmission.
  • the target terminal and the source terminal follow the new network protocol, and the above data of the new network needs to be followed. Structure. Therefore, the data packet or protocol packet sent by the new network to the target terminal, and the data packet or protocol packet sent by the source terminal in the Ethernet to the new network, the packet header includes the address of the new network at both ends of the transmission, and the address is a data packet. Or the source address (SA) and destination address (DA) of the protocol packet.
  • SA source address
  • DA destination address
  • the packet or protocol packet sent by the new network to the target terminal has the address of the new network
  • the DA and SA of the packet header are new network addresses, as shown in the following table:
  • the Ethernet Co-Transfer Gateway MAC (ie, MAC SA) and the target terminal MAC (ie, MAC DA) are added to the packet header, and then the Ethernet is transmitted to the target terminal according to the Ethernet protocol;
  • the data packet or protocol packet sent by the terminal to the new network and has the address of the new network and the MAC address of the Ethernet, that is, the packet header includes not only the DA and SA of the new network, but also the Ethernet Co-Transfer Gateway MAC (ie, MAC DA) and The source terminal MAC (ie MAC SA), as shown in the following table:
  • Ethernet protocol transfer gateway MAC and the source terminal MAC are removed in the packet header, and then the new network is entered and transmitted according to the novel network protocol.
  • the terminal connected to the L2 switch also establishes a binding relationship with the Ethernet protocol conversion gateway, and the binding refers to the MAC address of the Ethernet protocol conversion gateway and the MAC address of the terminal.
  • the address is a one-to-many mapping, that is, one terminal can register multiple terminals under one Ethernet protocol conversion gateway.
  • the binding of the terminal MAC address to the MAC address of the Ethernet protocol translation gateway is preset in the node server of the new network when the terminal and the Ethernet protocol conversion gateway are sold, and the node server notifies the Ethernet protocol conversion gateway. If you need to transfer the machine, you must re-register with the operator.
  • the MAC address of the Ethernet protocol conversion gateway can be solidified in each Ethernet protocol translation gateway, and the MAC address of the terminal can also be solidified in each terminal. In this case, the MAC address cannot be flexibly allocated.
  • the Ethernet protocol conversion gateway and the terminal both have the address of the new network and the MAC address of the Ethernet.
  • the new network address and the MAC address of the Ethernet also have a mapping relationship. This mapping relationship can also be maintained by the node server of the new network and notified to the Ethernet protocol conversion gateway.
  • the Ethernet protocol conversion gateway can search for the target terminal MAC address corresponding to the new network destination address (DA) in the packet according to the mapping, and Add to the package.
  • DA new network destination address
  • each Ethernet co-transfer gateway that is allowed to access the network is registered in the node server.
  • the registration information of the Ethernet co-transfer gateway has the serial number (including device type and device identification information) of the Ethernet protocol conversion gateway, and the number of downlink ports. Intrinsic information such as the mask interval, the Ethernet translation protocol gateway that is not registered cannot access the network.
  • Step 601 The node server with the centralized control function in the new network delivers the query packet; the node server sends the query packet to each port.
  • Step 602 After the Ethernet protocol conversion gateway is powered on and initialized, the query packet is received, and the response packet including the serial number of the Ethernet protocol translation gateway is returned.
  • the Ethernet protocol transfer gateway receives the query packet sent by a port (such as port 0).
  • Step 603 The node server searches for the Ethernet protocol translation gateway information corresponding to the sequence number in the registration information table, where the Ethernet protocol conversion gateway information includes an Ethernet protocol translation gateway MAC address and the Ethernet protocol translation gateway is tied Fixed terminal MAC address;
  • the node server After receiving the response packet sent by the Ethernet protocol translation gateway, the node server knows that port 0 is connected. An Ethernet protocol transfer gateway, and then look up the internal registration information table.
  • Step 604 The node server sends an incoming network command to the Ethernet protocol translation gateway, where the network access command includes an address of the Ethernet protocol translation gateway in the novel network and a MAC address of the Ethernet protocol translation gateway.
  • the node server will assign a new network address to the Ethernet protocol translation gateway and a pre-registered Ethernet MAC address, and notify the Ethernet protocol conversion gateway through the network access command.
  • Step 605 The Ethernet protocol conversion gateway returns a response after receiving the network access command, and the Ethernet protocol conversion gateway accesses the new network.
  • the Ethernet Co-Transfer Gateway After receiving the network access command, the Ethernet Co-Transfer Gateway knows the address of the new network and the MAC address of the Ethernet.
  • Step 606 The node server periodically sends a device status query command to the Ethernet protocol translation gateway of the network to check whether the Ethernet protocol translation gateway works normally.
  • the node server When the node server receives the incoming network command response, it knows that the Ethernet protocol conversion gateway has entered the network, and will periodically send a device status query command to port 0 periodically (for example, every second). If the node server does not receive a status query response within a certain period of time (such as 6 seconds), it considers that the Ethernet protocol translation gateway has been removed from the network, no longer sends a device status query command, and continues to send a query packet to port 0.
  • a certain period of time such as 6 seconds
  • Step 607 The node server notifies the Ethernet protocol translation gateway of the terminal MAC address bound to the Ethernet protocol translation gateway and the mapping between the terminal MAC address and the new network address to be allocated to the terminal.
  • the node server knows that the Ethernet protocol translation gateway is also bound to the terminal according to the registration information table, so the terminal MAC address bound to the Ethernet protocol translation gateway and the mapping of the terminal MAC address and the new network address to be allocated are Send to the Ethernet protocol transfer gateway.
  • the Ethernet protocol transfer gateway knows its own new network address, Ethernet MAC address, the terminal MAC address bound to it, and the mapping of the terminal MAC address to the new network address to be assigned to the terminal.
  • the data transmission of the novel network may be implemented by using an address table.
  • Each node in the new network including node servers, access switches, and The Ethernet co-transfer gateway maintains its own address table. Whenever data is received, it transfers data according to the address table. Since the data transmission between the new network and Ethernet mainly involves the transmission of query packets, response packets, unicast data packets and multicast data packets, the address table is also divided into:
  • Protocol packet address table hereinafter referred to as table 0, used for transmission oriented query packet or service request protocol packet;
  • response packet address lookup table hereinafter referred to as table 1 for transmitting a steering response packet
  • Multicast packet address table hereinafter referred to as table 3, used for transport-oriented multicast packets.
  • the Ethernet protocol conversion gateway In conjunction with the network access procedure of the foregoing Ethernet protocol conversion gateway, the Ethernet protocol conversion gateway initializes the configuration table No. 0, table No. 1, table No. 2, and table No. 3 during the power-on initialization process in step 302. Then, after receiving the network access command in step 305, the Ethernet protocol conversion gateway configures the table No. 0: directs the query packet or the service request protocol packet sent to the local machine to the CPU module port of the local machine. After that, after the Ethernet protocol conversion gateway sends the response to the network, the node server also sends a configuration command to the Ethernet protocol conversion gateway, and configures the number 0 table in the Ethernet protocol translation gateway: the packet is sent to the Ethernet protocol translation gateway. The query packet or service request protocol packet of the terminal is respectively directed to the corresponding port of the Ethernet protocol conversion gateway.
  • FIG. 7 it is a flowchart of a terminal accessing a novel network in an embodiment of the present invention.
  • each terminal that is allowed to access the network is registered in the node server and registered under the bound Ethernet protocol conversion gateway.
  • the terminal registration information has a terminal serial number (including device type and device identification information) and inherent information. Unregistered terminals cannot access the network.
  • Step 701 The node server with the centralized control function in the new network sends the query packet; when the Ethernet protocol conversion gateway enters the network, the node server sends the query packet to the Ethernet protocol translation gateway.
  • the downlink port sends a query packet to check whether a terminal device is connected to the Ethernet protocol translation gateway.
  • Step 702 The Ethernet protocol conversion gateway receives the query packet, and according to the protocol packet address table, directs the query packet to the corresponding port, and then adds the MAC address of the Ethernet protocol conversion gateway and the MAC address of the target terminal in the query packet. And forwarded;
  • the destination address (DA) of the query packet is a new type of network address that the node server is to allocate to the terminal. Therefore, after receiving the query packet, the Ethernet protocol translation gateway can map the new network address to the Ethernet MAC address. Find the corresponding terminal MAC address and then add it to the packet to send. After the query packet enters the Ethernet, it is transmitted according to the Ethernet protocol and finally transmitted to the target terminal.
  • Step 703 After the terminal is powered on and initialized, the terminal receives the query packet, and returns a response packet including the terminal serial number.
  • Step 704 The Ethernet protocol conversion gateway removes the MAC address and the terminal MAC address of the Ethernet protocol translation gateway in the response packet, and then forwards the MAC address to the node server.
  • the response packet includes an Ethernet protocol translation gateway MAC address, a terminal MAC address, a destination address (DA) of the new network, and a source address (SA), and the Ethernet protocol translation gateway removes the Ethernet protocol translation gateway MAC address and the terminal MAC address.
  • DA destination address
  • SA source address
  • Step 705 The node server finds the terminal information corresponding to the terminal serial number in the registration information table, and sends a network access command, where the network access command includes the address of the terminal in the novel network; after receiving the response packet sent by the terminal, the node server receives Know that the Ethernet Co-Transfer Gateway is connected to a terminal device, and then look up the internal registration information table.
  • Step 706 The Ethernet protocol conversion gateway receives the network access command, and adds the MAC address of the Ethernet co-transfer gateway and the MAC address of the target terminal, and then forwards the packet;
  • Step 707 After receiving the network access command, the terminal returns a response, and the Ethernet protocol translation gateway removes the MAC address and the terminal MAC address of the Ethernet protocol translation gateway in the response, and then forwards the MAC address to the node server, and the terminal accesses the new network;
  • the terminal When the terminal receives the network access command, it knows the address of the new network.
  • Step 708 The node server periodically sends a device status query instruction to the terminal that accesses the network. Check if the terminal is working properly.
  • the node server When the node server receives the incoming network command response, it knows that the terminal bound to the Ethernet protocol translation gateway has entered the network, and will periodically send a device status query command to the terminal (such as every second). If the node server does not receive the status query response within a certain period of time (such as 6 seconds), it considers that the terminal has been removed from the network, no longer sends the device status query command, and continues to send the query packet to the port.
  • a certain period of time such as 6 seconds
  • the data transmission inside the Ethernet follows the Ethernet protocol.
  • the L2 switch can send packets directly to the destination node instead of sending packets to all nodes in a broadcast manner like a hub.
  • the most critical technology is that the switch can identify the NIC MAC of the node connected to the network. Address and put them in a place called the MAC address table.
  • the MAC address table is stored in the cache of the switch and remembers these addresses, so that when data needs to be sent to the destination address, the switch can look up the node location of the MAC address in the MAC address table, and then directly to this location. The node is sent.
  • the number of MAC addresses refers to the maximum number of MAC addresses that can be stored in the MAC address table of the switch.
  • the switch can basically remember 1024 MAC addresses. On the central office, 1024 MAC addresses can be memorized. In the terminal, we support 16 MAC addresses due to FLASH issues and actual needs.
  • the MAC address is required to transfer information between hosts on the same subnet.
  • the first time we send a message there is only an IP address and no MAC address.
  • a packet is sent, and its IP address is the target.
  • IP address of the machine the MAC address is ff-ff-ff-ff-ff-ff-ff.
  • This MAC address indicates broadcast, that is, all the machines in the subnet can receive it.
  • the IP address is found. If it is not its own, it will discard the packet. If it is its own IP, it will send a packet to the source machine, which contains its own MAC address. After the original machine receives the packet, it knows the MAC address of the target machine. This is The MAC address is self-learning.
  • MAC address self-learning in a switch means that there is a MAC address and exchange in the switch.
  • Correspondence table of each interface of the machine (such as the switch of the general household has four interfaces). Whenever there is a packet forwarded by the switch, if there is no corresponding correspondence of the MAC address in its table, the packet will be forwarded to all ports.
  • the target machine returns information from a port, it knows which port the MAC address corresponds to, and then adds the corresponding relationship to the table. This is the MAC address self-learning of the switch.
  • the protocol packet or the data packet sent by the terminal includes the MAC address of the Ethernet protocol conversion gateway and the MAC address of the terminal, and the Ethernet protocol conversion gateway receives the After the protocol packet is described, the MAC address of the Ethernet protocol conversion gateway in the packet and the MAC address of the terminal are removed; the MAC address of the Ethernet protocol translation gateway and the MAC address of the terminal are not included in the protocol packet or the data packet sent by the node server. Address, but the packet passes through the corresponding Ethernet Co-Transfer Gateway, and the Ethernet Co-Transfer Gateway maps its own new network address to the Ethernet MAC address according to its internal record, and the new network address of the terminal bound to it.
  • the node server and the Ethernet protocol conversion gateway and the terminal can perform communication services (including the unicast communication service and the multicast communication service).
  • communication services including the unicast communication service and the multicast communication service.
  • a node server MSS-400 (access network address 0x0000) is set up, and port 0 of the port is connected to an Ethernet protocol transfer gateway BX-008-0 (access network address is 0x0001). ), its port 1 is connected to an Ethernet protocol gateway BX-008-1 (access network address is 0x0002), and port 0 of BX-008-0 is connected to a set-top box STB-0 (access) The network address is 0x0009), and port 1 of BX-008-1 is connected to a set-top box STB-1 (access network address is 0x0012).
  • the set-top box STB-0 sends a request to the node server MSS-400 for the unicast communication service for visual communication with the set-top box STB-1.
  • the steps are as follows:
  • the set-top box STB 0 issues a service request protocol packet
  • the DA (destination address) of the packet is 0x0800 0x0000 0x0000 0x0000 (that is, the address of the MSS-400)
  • SA (source address) is 0x0000 0x0000 0x0000 0x0009
  • MAC DA the MAC address of the Ethernet protocol transfer gateway BX-008-0
  • MAC SA set-top box STB-0 MAC address
  • it can also include reserved 0x0000 (reserved word), the PDU part is as follows
  • the program number and broadcast channel number involved in the service application are all placed in the service parameters, for example:
  • the month parameter is SERVICE_TYPE_ TELEPHONE_REQUEST or SERVICE_TYPE_ TELEPHONE_DIRECT.
  • the Ethernet protocol conversion gateway BX-008-0 connected between the set top box STB-0 and the node server MSS-400 receives the service request protocol packet, and first removes the Ethernet protocol conversion gateway BX-008 in the package.
  • the service request protocol package is directed to the node server MSS-400, and the node server MSS-400 determines the application (service type) for receiving the visual communication according to the content of the package, and checks according to the service number.
  • CAM table content-address mapping table
  • STB-1 target terminal
  • STB-1 link topology involved in this service, and determines that the link is allowed. Both parties can communicate.
  • DA is 0x8000 0x0000 0x0000 0x0012
  • SA is 0x0000 0x0000 0x0000 0x0000, reserved 0x0000
  • the PDU part is shown in the above table.
  • the two menu protocol packages are respectively directed to Set-top boxes STB 0 and STB-1, in which BX-008-0 and BX-008-1 add MAC DA and MAC SA to the two menu protocol packets respectively.
  • the called STB-1 issues an application SERVICE_TYPE_PERMISSION to accept STB-1 communication, and sends a response protocol packet to the node server MSS-400, which includes the MAC address of the Ethernet protocol transfer gateway BX-008-1 (MAC DA) And the MAC address of the set-top box STB-1 (MAC SA), including DA is 0x0800 0x0000 0x0000 0x0000, SA 0x0000 0x0000 0x0000 0x0012, reserved 0x0000, the service parameter is SERVICE TYPE PERMISSION, the PDU part is shown in the following table:
  • the Ethernet protocol conversion gateway BX-008-1 removes the MAC address (MAC DA) of the Ethernet protocol translation gateway BX-008-1 and the MAC address (MAC SA) of the set-top box STB-1 in the response protocol packet. Then, according to the configuration of the No. 1 table, the response protocol packet is directed to the node server MSS-400, and the node server MSS-400 determines that the application for accepting the visual communication is received according to the content of the packet, and the CAM table is known according to the service number. Called STB-1, according to its internal address information table, the node server MSS-400 knows the link topology involved in the service, and determines that the link is allowed, and the two parties can communicate.
  • MAC DA MAC address
  • MAC SA MAC address
  • DA destination address
  • the node server MSS-400 sends port configuration commands to all Ethernet protocol switching gateways on the uplink (calling path) and downlink (called path). It is required to simultaneously open the upstream of the opposite address and the downstream of its own address.
  • the DA of the second packet is 0x8000 0x0000 0x0000 0x0001
  • SA is 0x0000 0x0000 0x0000 0x0000, reserved 0x0000
  • the PDU part is shown in the following table:
  • the address of the open port is required: 0x1000 0x0000 0x0000
  • the DA of the first packet is 0x8000 0x0000 0x0000 0x0002, SA is 0x0000 000 0x0000 0x0000, reserved 0x0000, PDU is shown in the following table:
  • the DA of the second packet is 0x8000 0x0000 0x0000 0x0002
  • SA is 0x0000 x0000 0x0000 0x0000, reserved 0x0000
  • PDU is shown in the following table:
  • the packet sent to the STB-0 of the set-top box (service processing command, codec command in this example): DA 0x8000 0x0000 0x0000 0x0009, SA 0x0000 0x0000 0x0000 x0000, reserved 0x0000 of the packet, the PDU part is shown in the following table: Field number length code description
  • the encoding type is as shown in the following table:
  • the first four packets sent to the Ethernet Co-Transfer Gateway will be directed to BX-008-0 and BX-008-1 respectively.
  • Ethernet Co-Transfer Gateway BX-008-0 configures its own No. 2 table as follows:
  • Ethernet Co-Transfer Gateway BX-008-1 configures its own No. 2 table as follows:
  • the following two packets sent to the set-top box are respectively directed to Set-top boxes STB-0, STB-1.
  • BX-008-0 and BX-008-1 will add corresponding MAC DA and MAC SA to these two packets respectively.
  • the STB-0 and STB-1 of the set-top box can start encoding and decoding according to the content of the packet, and receive and send unicast data. Specifically, after the communication link of the current service is configured, the set top box STB-0,
  • the set top box STB-0 sends a unicast data packet to the set top box STB-1, the package including the MAC address of the Ethernet protocol transfer gateway BX-008-0 (MAC DA) and the MAC address of the set top box STB-0 (MAC SA).
  • the DA of the packet is 0x1000 0x0000 0x0000 0x0012; SA is 0x0000 0x0000 0x0000 0x0009;
  • the unicast data packet enters the Ethernet protocol conversion gateway BX-008-0, first removes the MAC DA and MAC SA, and then the Ethernet protocol conversion gateway ⁇ -008-0 exchanges the 1 engine module according to the combined address field.
  • the address of the table is "10 0000 0000 0001 0010”
  • DA destination address
  • the current unicast packet enters the set-top box STB-1 through the port 1; in the process, the BX-008-1 adds the MAC address of the Ethernet protocol-transfer gateway BX-008-1 (MAC) SA) and the MAC address of the set-top box STB-1 (MAC DA);
  • MAC Ethernet protocol-transfer gateway BX-008-1
  • the set-top box STB-1 sends a unicast data packet to the set-top box STB-0, the DA of the packet is 0x1000 0x0000 0x0000 0x0009; SA 0x0000 0x0000 0x0000 0x0012;
  • the packet also includes the MAC address of the Ethernet protocol transfer gateway BX-008-1 (MAC DA) and the MAC address of the set-top box STB-1 (MAC SA);
  • the unicast data packet enters the Ethernet protocol conversion gateway BX-008-1, first removes the MAC DA and MAC SA, and then the switching engine module of the Ethernet protocol conversion gateway BX-008-1 checks according to the combined address field.
  • MSS-400 the node server MSS-400;
  • MAC SA Ethernet Cooperative Gateway BX-008-0
  • the address of the IP Internet is told by the user equipment to the network; the novel network address of the present invention is told by the network to the user equipment.
  • the address of the novel network terminal of the present invention is learned through the network management protocol, and the user terminal can only With this learned address, the novel network of the present invention is entered, so that authentication is not required to ensure that it is not wrong. See the network management protocol for a detailed description.
  • the novel network of the present invention creates an ordered structure "color-based" address system (D/SCAF).
  • D/SCAF color-based address system
  • the novel network address of the present invention is not only unique, but also has a positionable and determinable function, and like the personal identification number, it implies other characteristics such as the geographical location of the user port, the nature of the device, and the service authority.
  • the novel network switch of the present invention specifies the behavior rules of the packet according to these characteristics, and implements data offloading of different natures.
  • Each service issues an independent pass, blocking the hacker attack and the spread of the virus; the IP Internet can freely enter and exit, and the user can prepare the firewall; the novel network of the present invention must apply for a pass for each service.
  • the present invention is directed to the characteristics of the current service (communication between two terminals under the same switch), and is set on the communication path, that is, the data packet of the service can be directly forwarded by the same switch. Without having to escalate to the node server. That is, the present invention can control the independent traffic for each service, and also considers the efficiency. When the terminals of the communication parties are located under the same switch, the node server is not needed, and the efficiency is greatly improved.
  • the communication protocol Since the communication protocol is executed at the user terminal, it may be tampered with. Since routing information is broadcast on the Internet, it may be eavesdropped. The inherent flaws in address spoofing, anonymous attacks, mail bombs, teardrops, covert monitoring, port scanning, internal intrusion, and altered information in the network provide space for hackers to display. Internet pollution such as spam is difficult to prevent.
  • IP Internet users can set up any IP address to impersonate others, they can send probes to any device on the network to spy on other people's information, and can also send arbitrary interference packets (staining water) to the network.
  • many smart people have invented various firewalls and tried to stay alone. However, installing a firewall is voluntary, the effect of the firewall is temporary and relative, and the IP Internet itself will never be clean. This is the second security failure of the IP Internet.
  • the network switch After the novel network user of the present invention enters the network, the network switch only allows the user to issue a limited service request to the node server, and all other data packets are closed. If the node server approves the user application, it sends a network passport to the switch where the user is located. If each data packet sent by the user terminal does not meet the audit conditions of the network switch, it will be discarded, completely eliminating hacker attacks. The pass is automatically revoked after each service. The pass mechanism is executed by the switch and is not used. Within the control of the user:
  • Audit target address Users can only send packets to the server-specified objects (determined at the time of service request)
  • Audit data traffic Users must send data traffic in accordance with server regulations (determined when the service is applied)
  • the novel network of the invention does not need negative means such as firewall, antivirus, encryption, internal and external network isolation, etc.
  • the novel network of the invention completely blocks the way of hacker attack and virus diffusion from the structure, and is a security network which can basically sit back and relax.
  • the network device is completely isolated from the user data, and the lifeline of the virus and the Trojan is cut off; the IP Internet device can disassemble the user data packet at will; the novel network device of the present invention is completely isolated from the user data. That is, in data transmission, the new network device (for example, a switch, a gateway, etc.) does not disassemble the user data packet, but directly searches for the mapping table according to the address of the data packet, and forwards it from the corresponding port. That is, the switch of the present invention does not have its own function of calculating and selecting a route.
  • the new network device for example, a switch, a gateway, etc.
  • the computer created by Von Neumann puts the program instructions and operational data in the same place, which means that a program can modify other programs and data in the machine.
  • This computer model which has been used to this day, has left a good opportunity for Trojan horses, worms, viruses, backdoors, and so on. With the rapid accumulation of viruses, anti-virus software and patches are always slow and passive.
  • IP Internet Protocol/IP protocol technology
  • best-effort store-and-forward
  • error-detection retransmission In order to realize the mission of the Internet, network servers and routers must have the ability to parse user data packets. This leaves a living path for hacker viruses. Since then, network security has become smarter than anyone else, and there is no peace. This is the third genetic flaw in the IP Internet.
  • the CPU in all the servers and switch devices of the novel network of the present invention access any one of the user data packets. That is to say, the entire novel network of the present invention is only for business A transparent pipe between the provider and the receiver's terminal device that establishes a complete isolation and traffic behavior specification. Regardless of what data is sent or received by the user terminal, it is irrelevant to the network. The lifeline of viruses and Trojans has been structurally cut off. Therefore, the novel network of the present invention eliminates the possibility of unrelated persons on the network stealing user data. Similarly, those who want to be hackers or drug makers have no object at all.
  • the IP Internet is a free market with no middlemen; the new network of the present invention is a department store with a middleman. For the network, both consumers and content providers belong to the network user category, but only in different sizes.
  • the IP Internet is an unmanaged free market where direct communication (P2P) is possible between any user.
  • P2P direct communication
  • whether or not to manage is the user has the final say, whether the charges are unilateral large users (suppliers) have the final say, whether or not to comply with the regulations is also a single large user (vampire website) has the final say. Operators can only accept admission fees at most. It is only impossible to implement legal, ethical, security and commercial rules. It is impossible now and in the future. This is the disability of the fourth structure of the IP Internet.
  • the novel network of the present invention creates a service node concept and forms a managed department store business model.
  • node server intermediary
  • MP2P managed user-to-user communication
  • IP Internet pursues first communication, post-management mode; the novel network of the present invention adopts first management and post-communication mode.
  • IP Internet defines management as an additional additional service built on the application layer. Therefore, management naturally becomes a dispensable display. This is the fifth intractable nature of the IP Internet.
  • the novel network user terminal of the present invention can only select one of the designated services within the scope of the node server license.
  • the protocol signaling during the service establishment process is performed by the node server (without the user's hand).
  • the user terminal only passively answers the server's questions, accepts or rejects the service, and cannot participate in the protocol process.
  • the data packet can only be sent in the manner specified by the passport. Any data packets that deviate from the passport are always discarded in the underlying switch.
  • the basic idea of the novel network protocol of the present invention is to implement a business model centered on service content, rather than simply completing a simple data exchange. In this mode, security is an intrinsic property of MPTV, not an additional service item attached to the network.
  • the device embodiment of the present invention relates to a service communication system of an access network device, a node server, and an access switch.
  • the device embodiment basically corresponds to the foregoing method embodiment. For details, refer to the related description in the foregoing method embodiment. This will not go into details.

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  • Engineering & Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Signal Processing (AREA)
  • Data Exchanges In Wide-Area Networks (AREA)

Abstract

La présente invention concerne un procédé de communication de service d'un appareil de réseau d'accès. L'appareil de réseau d'accès comprend un terminal source et un terminal cible connectés tous deux au même commutateur d'accès. Le procédé comprend les opérations suivantes : selon une demande d'un service courant, un serveur de nœud notifie au commutateur d'accès, auquel le terminal source et le terminal cible sont tous deux connectés, de définir un port de liaison descendante du commutateur d'accès auquel un paquet de données du service courant est adressé dans une table interne d'adresses de paquet de données dudit commutateur ; le terminal source envoie un paquet de données de liaison montante du service courant ; et après la réception du paquet de données, le commutateur d'accès dirige le paquet de données vers le port de liaison descendante correspondant selon les informations de sa table interne d'adresses de paquet de données, et transmet le paquet de données au terminal cible par le biais du port de liaison descendante. La présente invention peut économiser efficacement des ressources de largeur de bande et de routage, assurer un chemin de transmission régulier et continu, éviter un retard dans des services multimédias, satisfaire les exigences sur la sécurité nationale des informations et économiser des ressources matérielles, assurant de cette façon la qualité de la transmission dans le réseau.
PCT/CN2011/078009 2010-08-06 2011-08-04 Procédé et système de communication de service d'un appareil de réseau d'accès WO2012016536A1 (fr)

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